diff --git a/Gemfile b/Gemfile
index 5063f8e..81d320ad 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem "nanoc", "~> 4.12"
 # filters
 gem "nanoc-gzip.rb"
 gem "nanoc-webpack.rb", "~> 0.10.3"
-gem "nanoc-tidy.rb", "~> 0.8"
+gem "nanoc-tidy.rb", "~> 0.8.1"
 gem "rainpress", "~> 1.0"
 gem "sass", "~> 3.7"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index f66cbdd..5f94590 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -62,7 +62,7 @@ GEM
       nanoc-core (~> 4.11, >= 4.11.15)
     nanoc-gzip.rb (0.2.3)
       nanoc (~> 4.12)
-    nanoc-tidy.rb (0.8.0)
+    nanoc-tidy.rb (0.8.1)
       test-cmd.rb (~> 0.12.2)
     nanoc-webpack.rb (0.10.3)
       ryo.rb (~> 0.5)
@@ -156,7 +156,7 @@ DEPENDENCIES
   listen (~> 3.0)
   nanoc (~> 4.12)
   nanoc-gzip.rb
-  nanoc-tidy.rb (~> 0.8)
+  nanoc-tidy.rb (~> 0.8.1)
   nanoc-webpack.rb (~> 0.10.3)
   paint (~> 2.3)
   rainpress (~> 1.0)