diff --git a/tools/profile b/tools/profile
index fbea67492b934..0cc01f517b636 100755
--- a/tools/profile
+++ b/tools/profile
@@ -63,9 +63,9 @@ end
 
 RequireProfiler.stats.each do |file, depth, sec|
   if sec
-    puts "%8.1f ms  %s%s" % [sec * 1000, ' ' * depth, file]
+    puts '%8.1f ms  %s%s' % [sec * 1000, ' ' * depth, file]
   else
     puts "#{' ' * (13 + depth)}#{file}"
   end
 end
-puts "%8.1f ms  %d KB RSS" % [elapsed * 1000, after_rss - before_rss]
+puts '%8.1f ms  %d KB RSS' % [elapsed * 1000, after_rss - before_rss]
diff --git a/version.rb b/version.rb
index 923cab4e2a72a..9116b10c9aa40 100644
--- a/version.rb
+++ b/version.rb
@@ -3,8 +3,8 @@ module VERSION
     MAJOR = 4
     MINOR = 1
     TINY  = 0
-    PRE   = "beta1"
+    PRE   = 'beta1'
 
-    STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
+    STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
   end
 end