diff --git a/Gemfile b/Gemfile
index ee13fe5..c275baf 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,6 +9,6 @@ gem 'rb-fsevent', require: false
 gem "compass-holmes"
 gem 'oily_png'
 gem "sass"
-gem "slim"
+gem "slim", "~> 1.3.7"
 gem "rake"
 gem "susy"
diff --git a/Gemfile.lock b/Gemfile.lock
index e84d283..33f0fe7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -103,8 +103,8 @@ GEM
       rack (~> 1.4)
       rack-protection (~> 1.3)
       tilt (~> 1.3, >= 1.3.3)
-    slim (2.0.0)
-      temple (~> 0.6.5)
+    slim (1.3.9)
+      temple (~> 0.6.3)
       tilt (~> 1.3, >= 1.3.3)
     smusher (0.4.9)
       httpclient (>= 2.2)
@@ -147,5 +147,5 @@ DEPENDENCIES
   rb-fsevent
   rb-inotify
   sass
-  slim
+  slim (~> 1.3.7)
   susy