diff --git a/README.md b/README.md
index 236c5f83..ea24e857 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ ruby-plsql gem provides simple Ruby API for calling Oracle PL/SQL procedures. It
 
 NUMBER, BINARY_INTEGER, PLS_INTEGER, NATURAL, NATURALN, POSITIVE, POSITIVEN, SIGNTYPE, SIMPLE_INTEGER, VARCHAR, VARCHAR2, NVARCHAR2, CHAR, NCHAR, DATE, TIMESTAMP, CLOB, BLOB, BOOLEAN, PL/SQL RECORD, TABLE, VARRAY, OBJECT and CURSOR types are supported for input and output parameters and return values of PL/SQL procedures and functions.
 
-ruby-plsql supports Ruby 1.8.7, 1.9.3, 2.1, 2.2, 2.3, 2.4, 2.5 (ruby-oci8 2.2.3+ is needed for Ruby 2.4) and JRuby 1.6.7, 1.7.16, 9.0, 9.1 implementations.
+ruby-plsql supports Ruby 2.2, 2.3, 2.4, 2.5 (ruby-oci8 2.2.3+ is needed for Ruby 2.4) and JRuby 9.1 implementations.
 
 USAGE
 -----
@@ -135,7 +135,7 @@ or include gem in Gemfile if using bundler.
 
 In addition install either ruby-oci8 (for MRI/YARV) or copy Oracle JDBC driver to $JRUBY_HOME/lib (for JRuby).
 
-If you are using MRI 1.8, 1.9 or 2.x Ruby implementation then you need to install ruby-oci8 gem (version 2.0.x or 2.1.x)
+If you are using MRI Ruby implementation then you need to install ruby-oci8 gem (version 2.0.x or 2.1.x)
 as well as Oracle client, e.g. [Oracle Instant Client](http://www.oracle.com/technetwork/database/features/instant-client/index-097480.html).
 
 If you are using JRuby then you need to download latest [Oracle JDBC driver](http://www.oracle.com/technetwork/database/enterprise-edition/jdbc-112010-090769.html) - either ojdbc7.jar for Java 8 and 7, ojdbc6.jar for Java 6, 7, 8 or ojdbc5.jar for Java 5. You can refer [the support matrix](http://www.oracle.com/technetwork/database/enterprise-edition/jdbc-faq-090281.html#01_03) for details.