diff --git a/config.m4 b/config.m4
index 673107a..3f4ab0f 100644
--- a/config.m4
+++ b/config.m4
@@ -39,5 +39,6 @@ fi
 
 if test "$PHP_JWT" != "no"; then
   PHP_SUBST(JWT_SHARED_LIBADD)
+  PHP_ADD_EXTENSION_DEP(jwt, json)
   PHP_NEW_EXTENSION(jwt, jwt.c openssl.c, $ext_shared)
 fi
diff --git a/jwt.c b/jwt.c
index a682a55..4a35467 100644
--- a/jwt.c
+++ b/jwt.c
@@ -438,8 +438,14 @@ PHP_MINFO_FUNCTION(jwt)
     php_info_print_table_end();
 }
 
+static const zend_module_dep jwt_dep_deps[] = {
+    ZEND_MOD_REQUIRED("json")
+    ZEND_MOD_END
+};
+
 zend_module_entry jwt_module_entry = {
-    STANDARD_MODULE_HEADER,
+    STANDARD_MODULE_HEADER_EX, NULL,
+    jwt_dep_deps,
     "jwt",
     jwt_functions,
     PHP_MINIT(jwt),