diff --git a/lib/json/jwk/jwkizable.rb b/lib/json/jwk/jwkizable.rb
index <HASH>..<HASH> 100644
--- a/lib/json/jwk/jwkizable.rb
+++ b/lib/json/jwk/jwkizable.rb
@@ -69,5 +69,5 @@ module JSON
   end
 end
 
-OpenSSL::PKey::RSA.include JSON::JWK::JWKizable::RSA
-OpenSSL::PKey::EC.include JSON::JWK::JWKizable::EC
\ No newline at end of file
+OpenSSL::PKey::RSA.send :include, JSON::JWK::JWKizable::RSA
+OpenSSL::PKey::EC.send :include, JSON::JWK::JWKizable::EC
\ No newline at end of file
Class#include was private before..