diff --git a/lib/weakref.rb b/lib/weakref.rb
index cdfbe4a679..ff04e37be3 100644
--- a/lib/weakref.rb
+++ b/lib/weakref.rb
@@ -78,7 +78,7 @@ class WeakRef < Delegator
   # Creates a weak reference to +orig+
   #
   # Raises an ArgumentError if the given +orig+ is immutable, such as Symbol,
-  # Fixnum, or Float.
+  # Integer, or Float.
 
   def initialize(orig)
     case orig
diff --git a/version.h b/version.h
index 9191363392..81f02bd3cf 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.4.0"
 #define RUBY_RELEASE_DATE "2017-03-12"
-#define RUBY_PATCHLEVEL 40
+#define RUBY_PATCHLEVEL 41
 
 #define RUBY_RELEASE_YEAR 2017
 #define RUBY_RELEASE_MONTH 3