diff --git a/nanoc/rules/assets.rules b/nanoc/rules/assets.rules
index c7b944d..944339f 100644
--- a/nanoc/rules/assets.rules
+++ b/nanoc/rules/assets.rules
@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
-# Contains rules for images, fonts, etc
+# contains rules for images, fonts, etc
 
 ##
 # fonts
diff --git a/nanoc/rules/index.rules b/nanoc/rules/index.rules
index eb05e6e..736e2cd 100644
--- a/nanoc/rules/index.rules
+++ b/nanoc/rules/index.rules
@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
-# Contains rules for the surah index available at /<locale>/
+# contains rules for the surah index available at /<locale>/
 
 locales.each do |locale|
   compile "/html/index.html.erb", rep: "/#{locale}/surah/index" do
diff --git a/nanoc/rules/random.rules b/nanoc/rules/random.rules
index fe23b4c..9eae2f2 100644
--- a/nanoc/rules/random.rules
+++ b/nanoc/rules/random.rules
@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
-# Contains rules for a redirect from /<locale>/random/ to a
+# contains rules for a redirect from /<locale>/random/ to a
 # random surah (eg /en/random/ -> /en/al-kahf/)
 
 locales.each do |locale|
diff --git a/nanoc/rules/redirect.rules b/nanoc/rules/redirect.rules
index 9398506..e4c5bca 100644
--- a/nanoc/rules/redirect.rules
+++ b/nanoc/rules/redirect.rules
@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
-# Contains rules for a redirect from the root path
+# contains rules for a redirect from the root path
 # to the surah index for a given locale (eg / -> /en/)
 
 compile "/html/redirect.html.erb" do
diff --git a/nanoc/rules/stream.rules b/nanoc/rules/stream.rules
index 61a991a..dc42f01 100644
--- a/nanoc/rules/stream.rules
+++ b/nanoc/rules/stream.rules
@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
-# Contains rules for the the surah stream available
+# contains rules for the the surah stream available
 # at /<locale>/<name>/, /<locale>/<id>/
 
 compile "/json/*/*/surah.json" do