diff --git a/include/ruby/version.h b/include/ruby/version.h
index 10b1b05436..a4d319f646 100644
--- a/include/ruby/version.h
+++ b/include/ruby/version.h
@@ -31,7 +31,7 @@
 
 /* API version */
 #define RUBY_API_VERSION_MAJOR 2
-#define RUBY_API_VERSION_MINOR 5
+#define RUBY_API_VERSION_MINOR 6
 #define RUBY_API_VERSION_TEENY 0
 #define RUBY_API_VERSION_CODE (RUBY_API_VERSION_MAJOR*10000+RUBY_API_VERSION_MINOR*100+RUBY_API_VERSION_TEENY)
 
diff --git a/version.h b/version.h
index 8e1fb493c1..1926cacc68 100644
--- a/version.h
+++ b/version.h
@@ -1,4 +1,4 @@
-#define RUBY_VERSION "2.5.0"
+#define RUBY_VERSION "2.6.0"
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
 #define RUBY_PATCHLEVEL -1