diff --git a/Gemfile b/Gemfile
index bccab3d..951f0ad 100644
--- a/Gemfile
+++ b/Gemfile
@@ -20,7 +20,7 @@ gem 'wdm', '~> 0.1.1', :platforms => [:mswin, :mingw]
 gem 'tzinfo-data', platforms: [:mswin, :mingw]
 
 # Precompilers
-gem 'slim', '~> 3.0', '>= 3.0.8'
+gem 'slim', '~> 4.1'
 
 # Manage ITCSS structure
 gem 'itcsscli', '~> 0.1.15'
diff --git a/Gemfile.lock b/Gemfile.lock
index fd288f2..1d19fcd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -102,13 +102,13 @@ GEM
     rb-readline (0.5.5)
     sass (3.4.25)
     servolux (0.13.0)
-    slim (3.0.8)
+    slim (4.1.0)
       temple (>= 0.7.6, < 0.9)
-      tilt (>= 1.3.3, < 2.1)
-    temple (0.8.0)
+      tilt (>= 2.0.6, < 2.1)
+    temple (0.8.2)
     thor (0.20.0)
     thread_safe (0.3.6)
-    tilt (2.0.8)
+    tilt (2.0.10)
     tzinfo (1.2.3)
       thread_safe (~> 0.1)
     uglifier (3.2.0)
@@ -123,7 +123,7 @@ DEPENDENCIES
   middleman-livereload (~> 3.4, >= 3.4.6)
   puma (~> 3.11)
   rack-contrib (~> 2.0)
-  slim (~> 3.0, >= 3.0.8)
+  slim (~> 4.1)
   tzinfo-data
   wdm (~> 0.1.1)