diff --git a/ext/openssl/extconf.rb b/ext/openssl/extconf.rb
index dd3732d0a..563d339b1 100644
--- a/ext/openssl/extconf.rb
+++ b/ext/openssl/extconf.rb
@@ -8,7 +8,7 @@
 
 = Licence
   This program is licensed under the same licence as Ruby.
-  (See the file 'LICENCE'.)
+  (See the file 'COPYING'.)
 =end
 
 require "mkmf"
diff --git a/ext/openssl/openssl_missing.c b/ext/openssl/openssl_missing.c
index 4415703db..5a6d23e10 100644
--- a/ext/openssl/openssl_missing.c
+++ b/ext/openssl/openssl_missing.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include RUBY_EXTCONF_H
 
diff --git a/ext/openssl/openssl_missing.h b/ext/openssl/openssl_missing.h
index 8629bfe50..0711f924e 100644
--- a/ext/openssl/openssl_missing.h
+++ b/ext/openssl/openssl_missing.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_OPENSSL_MISSING_H_)
 #define _OSSL_OPENSSL_MISSING_H_
diff --git a/ext/openssl/ossl.c b/ext/openssl/ossl.c
index 00eded55c..59ad7d19a 100644
--- a/ext/openssl/ossl.c
+++ b/ext/openssl/ossl.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 #include <stdarg.h> /* for ossl_raise */
diff --git a/ext/openssl/ossl.h b/ext/openssl/ossl.h
index 68d42b71e..c3140ac3e 100644
--- a/ext/openssl/ossl.h
+++ b/ext/openssl/ossl.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_H_)
 #define _OSSL_H_
diff --git a/ext/openssl/ossl_asn1.c b/ext/openssl/ossl_asn1.c
index 71c452c88..bc44ebc48 100644
--- a/ext/openssl/ossl_asn1.c
+++ b/ext/openssl/ossl_asn1.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_asn1.h b/ext/openssl/ossl_asn1.h
index 939a96ce7..f47e35394 100644
--- a/ext/openssl/ossl_asn1.h
+++ b/ext/openssl/ossl_asn1.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_ASN1_H_)
 #define _OSSL_ASN1_H_
diff --git a/ext/openssl/ossl_bio.c b/ext/openssl/ossl_bio.c
index 42833d901..2ef208050 100644
--- a/ext/openssl/ossl_bio.c
+++ b/ext/openssl/ossl_bio.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_bio.h b/ext/openssl/ossl_bio.h
index da68c5e5a..1b871f1cd 100644
--- a/ext/openssl/ossl_bio.h
+++ b/ext/openssl/ossl_bio.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_BIO_H_)
 #define _OSSL_BIO_H_
diff --git a/ext/openssl/ossl_bn.c b/ext/openssl/ossl_bn.c
index ce0d3ec7e..7393fdea5 100644
--- a/ext/openssl/ossl_bn.c
+++ b/ext/openssl/ossl_bn.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 /* modified by Michal Rokos <m.rokos@sh.cvut.cz> */
 #include "ossl.h"
diff --git a/ext/openssl/ossl_bn.h b/ext/openssl/ossl_bn.h
index 1cc041fc2..800f84cb1 100644
--- a/ext/openssl/ossl_bn.h
+++ b/ext/openssl/ossl_bn.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_BN_H_)
 #define _OSSL_BN_H_
diff --git a/ext/openssl/ossl_cipher.c b/ext/openssl/ossl_cipher.c
index 1910a5cde..e362f4f16 100644
--- a/ext/openssl/ossl_cipher.c
+++ b/ext/openssl/ossl_cipher.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_cipher.h b/ext/openssl/ossl_cipher.h
index 2392d41c6..07b50c3bd 100644
--- a/ext/openssl/ossl_cipher.h
+++ b/ext/openssl/ossl_cipher.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_CIPHER_H_)
 #define _OSSL_CIPHER_H_
diff --git a/ext/openssl/ossl_config.c b/ext/openssl/ossl_config.c
index 0e598b4d5..55875028b 100644
--- a/ext/openssl/ossl_config.c
+++ b/ext/openssl/ossl_config.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_config.h b/ext/openssl/ossl_config.h
index 4e604f1ae..a254360c2 100644
--- a/ext/openssl/ossl_config.h
+++ b/ext/openssl/ossl_config.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #ifndef OSSL_CONFIG_H
 #define OSSL_CONFIG_H
diff --git a/ext/openssl/ossl_digest.c b/ext/openssl/ossl_digest.c
index 1ae26a235..00ec8931a 100644
--- a/ext/openssl/ossl_digest.c
+++ b/ext/openssl/ossl_digest.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_digest.h b/ext/openssl/ossl_digest.h
index 50bf5666a..99771b8ae 100644
--- a/ext/openssl/ossl_digest.h
+++ b/ext/openssl/ossl_digest.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_DIGEST_H_)
 #define _OSSL_DIGEST_H_
diff --git a/ext/openssl/ossl_engine.c b/ext/openssl/ossl_engine.c
index 9e86321d0..294d58ade 100644
--- a/ext/openssl/ossl_engine.c
+++ b/ext/openssl/ossl_engine.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_engine.h b/ext/openssl/ossl_engine.h
index cd548beea..f6f4ff4c1 100644
--- a/ext/openssl/ossl_engine.h
+++ b/ext/openssl/ossl_engine.h
@@ -6,7 +6,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(OSSL_ENGINE_H)
 #define OSSL_ENGINE_H
diff --git a/ext/openssl/ossl_hmac.c b/ext/openssl/ossl_hmac.c
index c485ba7e6..b1163f612 100644
--- a/ext/openssl/ossl_hmac.c
+++ b/ext/openssl/ossl_hmac.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_hmac.h b/ext/openssl/ossl_hmac.h
index 7c51f4722..17427587b 100644
--- a/ext/openssl/ossl_hmac.h
+++ b/ext/openssl/ossl_hmac.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_HMAC_H_)
 #define _OSSL_HMAC_H_
diff --git a/ext/openssl/ossl_ns_spki.c b/ext/openssl/ossl_ns_spki.c
index 9d70b5d87..e822d5e0a 100644
--- a/ext/openssl/ossl_ns_spki.c
+++ b/ext/openssl/ossl_ns_spki.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_ns_spki.h b/ext/openssl/ossl_ns_spki.h
index 62ba8cb16..20d685768 100644
--- a/ext/openssl/ossl_ns_spki.h
+++ b/ext/openssl/ossl_ns_spki.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_NS_SPKI_H_)
 #define _OSSL_NS_SPKI_H_
diff --git a/ext/openssl/ossl_ocsp.c b/ext/openssl/ossl_ocsp.c
index df986bb3e..9796d44a2 100644
--- a/ext/openssl/ossl_ocsp.c
+++ b/ext/openssl/ossl_ocsp.c
@@ -6,7 +6,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_ocsp.h b/ext/openssl/ossl_ocsp.h
index 6d2aac865..07da7d168 100644
--- a/ext/openssl/ossl_ocsp.h
+++ b/ext/openssl/ossl_ocsp.h
@@ -6,7 +6,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_OCSP_H_)
 #define _OSSL_OCSP_H_
diff --git a/ext/openssl/ossl_pkcs12.c b/ext/openssl/ossl_pkcs12.c
index 164b2da46..81589fd80 100644
--- a/ext/openssl/ossl_pkcs12.c
+++ b/ext/openssl/ossl_pkcs12.c
@@ -1,6 +1,6 @@
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_pkcs12.h b/ext/openssl/ossl_pkcs12.h
index fe4f15ef6..d4003e81c 100644
--- a/ext/openssl/ossl_pkcs12.h
+++ b/ext/openssl/ossl_pkcs12.h
@@ -1,6 +1,6 @@
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_PKCS12_H_)
 #define _OSSL_PKCS12_H_
diff --git a/ext/openssl/ossl_pkcs7.c b/ext/openssl/ossl_pkcs7.c
index 78dcbd667..ae498c454 100644
--- a/ext/openssl/ossl_pkcs7.c
+++ b/ext/openssl/ossl_pkcs7.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_pkcs7.h b/ext/openssl/ossl_pkcs7.h
index 3e1b09467..4cbbc6a1a 100644
--- a/ext/openssl/ossl_pkcs7.h
+++ b/ext/openssl/ossl_pkcs7.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_PKCS7_H_)
 #define _OSSL_PKCS7_H_
diff --git a/ext/openssl/ossl_pkey.c b/ext/openssl/ossl_pkey.c
index 013412c27..6af2245f3 100644
--- a/ext/openssl/ossl_pkey.c
+++ b/ext/openssl/ossl_pkey.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_pkey.h b/ext/openssl/ossl_pkey.h
index 10669b824..37d828e04 100644
--- a/ext/openssl/ossl_pkey.h
+++ b/ext/openssl/ossl_pkey.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(OSSL_PKEY_H)
 #define OSSL_PKEY_H
diff --git a/ext/openssl/ossl_pkey_dh.c b/ext/openssl/ossl_pkey_dh.c
index a231814a9..00699b9b0 100644
--- a/ext/openssl/ossl_pkey_dh.c
+++ b/ext/openssl/ossl_pkey_dh.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_pkey_dsa.c b/ext/openssl/ossl_pkey_dsa.c
index 058ce7388..a7598d1e8 100644
--- a/ext/openssl/ossl_pkey_dsa.c
+++ b/ext/openssl/ossl_pkey_dsa.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_pkey_rsa.c b/ext/openssl/ossl_pkey_rsa.c
index 389f76f30..7d986989e 100644
--- a/ext/openssl/ossl_pkey_rsa.c
+++ b/ext/openssl/ossl_pkey_rsa.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_provider.c b/ext/openssl/ossl_provider.c
index 981c6ccdc..d1f6c5d42 100644
--- a/ext/openssl/ossl_provider.c
+++ b/ext/openssl/ossl_provider.c
@@ -1,6 +1,6 @@
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_rand.c b/ext/openssl/ossl_rand.c
index 659dc818b..774e7836d 100644
--- a/ext/openssl/ossl_rand.c
+++ b/ext/openssl/ossl_rand.c
@@ -5,7 +5,7 @@
  * All rights reserved.
  *
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_rand.h b/ext/openssl/ossl_rand.h
index 8f77a3b23..874ab539b 100644
--- a/ext/openssl/ossl_rand.h
+++ b/ext/openssl/ossl_rand.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_RAND_H_)
 #define _OSSL_RAND_H_
diff --git a/ext/openssl/ossl_ssl.c b/ext/openssl/ossl_ssl.c
index 9f374b65f..d7522cf08 100644
--- a/ext/openssl/ossl_ssl.c
+++ b/ext/openssl/ossl_ssl.c
@@ -7,7 +7,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_ssl.h b/ext/openssl/ossl_ssl.h
index 535c56097..a92985c60 100644
--- a/ext/openssl/ossl_ssl.h
+++ b/ext/openssl/ossl_ssl.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_SSL_H_)
 #define _OSSL_SSL_H_
diff --git a/ext/openssl/ossl_ts.c b/ext/openssl/ossl_ts.c
index f698bdc7f..a24ceb1ce 100644
--- a/ext/openssl/ossl_ts.c
+++ b/ext/openssl/ossl_ts.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licenced under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_ts.h b/ext/openssl/ossl_ts.h
index 25fb0e1d6..eeca3046e 100644
--- a/ext/openssl/ossl_ts.h
+++ b/ext/openssl/ossl_ts.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licenced under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 
 #if !defined(_OSSL_TS_H_)
diff --git a/ext/openssl/ossl_x509.c b/ext/openssl/ossl_x509.c
index f8470703f..9686fc1a9 100644
--- a/ext/openssl/ossl_x509.c
+++ b/ext/openssl/ossl_x509.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_x509.h b/ext/openssl/ossl_x509.h
index 4fadfa6b8..88e3f16a1 100644
--- a/ext/openssl/ossl_x509.h
+++ b/ext/openssl/ossl_x509.h
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #if !defined(_OSSL_X509_H_)
 #define _OSSL_X509_H_
diff --git a/ext/openssl/ossl_x509attr.c b/ext/openssl/ossl_x509attr.c
index d1d8bb5e9..be525c9e7 100644
--- a/ext/openssl/ossl_x509attr.c
+++ b/ext/openssl/ossl_x509attr.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_x509cert.c b/ext/openssl/ossl_x509cert.c
index aa6b9bb7c..0c2355d83 100644
--- a/ext/openssl/ossl_x509cert.c
+++ b/ext/openssl/ossl_x509cert.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_x509crl.c b/ext/openssl/ossl_x509crl.c
index 80e29f9df..368270ce1 100644
--- a/ext/openssl/ossl_x509crl.c
+++ b/ext/openssl/ossl_x509crl.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_x509ext.c b/ext/openssl/ossl_x509ext.c
index 192d09bd3..7f47cd7cc 100644
--- a/ext/openssl/ossl_x509ext.c
+++ b/ext/openssl/ossl_x509ext.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_x509name.c b/ext/openssl/ossl_x509name.c
index 9591912f7..5060be92c 100644
--- a/ext/openssl/ossl_x509name.c
+++ b/ext/openssl/ossl_x509name.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_x509req.c b/ext/openssl/ossl_x509req.c
index f05818515..37ba03728 100644
--- a/ext/openssl/ossl_x509req.c
+++ b/ext/openssl/ossl_x509req.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_x509revoked.c b/ext/openssl/ossl_x509revoked.c
index 108447c86..5b82470c8 100644
--- a/ext/openssl/ossl_x509revoked.c
+++ b/ext/openssl/ossl_x509revoked.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/ext/openssl/ossl_x509store.c b/ext/openssl/ossl_x509store.c
index f27381ca9..31328ec47 100644
--- a/ext/openssl/ossl_x509store.c
+++ b/ext/openssl/ossl_x509store.c
@@ -5,7 +5,7 @@
  */
 /*
  * This program is licensed under the same licence as Ruby.
- * (See the file 'LICENCE'.)
+ * (See the file 'COPYING'.)
  */
 #include "ossl.h"
 
diff --git a/lib/openssl.rb b/lib/openssl.rb
index 8a342f15b..f5ca956d0 100644
--- a/lib/openssl.rb
+++ b/lib/openssl.rb
@@ -7,7 +7,7 @@
 
 = Licence
   This program is licensed under the same licence as Ruby.
-  (See the file 'LICENCE'.)
+  (See the file 'COPYING'.)
 =end
 
 require 'openssl.so'
diff --git a/lib/openssl/bn.rb b/lib/openssl/bn.rb
index 0a5e11b4c..e4889a140 100644
--- a/lib/openssl/bn.rb
+++ b/lib/openssl/bn.rb
@@ -10,7 +10,7 @@
 #
 # = Licence
 # This program is licensed under the same licence as Ruby.
-# (See the file 'LICENCE'.)
+# (See the file 'COPYING'.)
 #++
 
 module OpenSSL
diff --git a/lib/openssl/buffering.rb b/lib/openssl/buffering.rb
index 68aa7bc97..457991d23 100644
--- a/lib/openssl/buffering.rb
+++ b/lib/openssl/buffering.rb
@@ -8,7 +8,7 @@
 #
 #= Licence
 #  This program is licensed under the same licence as Ruby.
-#  (See the file 'LICENCE'.)
+#  (See the file 'COPYING'.)
 #++
 
 ##
diff --git a/lib/openssl/cipher.rb b/lib/openssl/cipher.rb
index 8ad8c35dd..ab75ac8e1 100644
--- a/lib/openssl/cipher.rb
+++ b/lib/openssl/cipher.rb
@@ -9,7 +9,7 @@
 #
 # = Licence
 # This program is licensed under the same licence as Ruby.
-# (See the file 'LICENCE'.)
+# (See the file 'COPYING'.)
 #++
 
 module OpenSSL
diff --git a/lib/openssl/digest.rb b/lib/openssl/digest.rb
index 0f35ddadd..5cda1e931 100644
--- a/lib/openssl/digest.rb
+++ b/lib/openssl/digest.rb
@@ -9,7 +9,7 @@
 #
 # = Licence
 # This program is licensed under the same licence as Ruby.
-# (See the file 'LICENCE'.)
+# (See the file 'COPYING'.)
 #++
 
 module OpenSSL
diff --git a/lib/openssl/marshal.rb b/lib/openssl/marshal.rb
index af5647192..eb8eda474 100644
--- a/lib/openssl/marshal.rb
+++ b/lib/openssl/marshal.rb
@@ -9,7 +9,7 @@
 #
 # = Licence
 # This program is licensed under the same licence as Ruby.
-# (See the file 'LICENCE'.)
+# (See the file 'COPYING'.)
 #++
 module OpenSSL
   module Marshal
diff --git a/lib/openssl/ssl.rb b/lib/openssl/ssl.rb
index d28bf1a37..2186f5f43 100644
--- a/lib/openssl/ssl.rb
+++ b/lib/openssl/ssl.rb
@@ -7,7 +7,7 @@
 
 = Licence
   This program is licensed under the same licence as Ruby.
-  (See the file 'LICENCE'.)
+  (See the file 'COPYING'.)
 =end
 
 require "openssl/buffering"
diff --git a/lib/openssl/x509.rb b/lib/openssl/x509.rb
index f973f4f4d..b66727420 100644
--- a/lib/openssl/x509.rb
+++ b/lib/openssl/x509.rb
@@ -9,7 +9,7 @@
 #
 # = Licence
 # This program is licensed under the same licence as Ruby.
-# (See the file 'LICENCE'.)
+# (See the file 'COPYING'.)
 #++
 
 require_relative 'marshal'