diff --git a/Gemfile.lock b/Gemfile.lock
index 37b722171..27a97c52e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -88,7 +88,7 @@ GEM
     celluloid-io (0.16.2)
       celluloid (>= 0.16.0)
       nio4r (>= 1.1.0)
-    childprocess (0.5.8)
+    childprocess (0.5.9)
       ffi (~> 1.0, >= 1.0.11)
     chunky_png (1.3.5)
     coderay (1.1.0)