diff --git a/CHANGELOG.md b/CHANGELOG.md
index be8b02b8..74313984 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -45,6 +45,12 @@
 
 
 ### Changed
+
+* PaperColorDark and PaperColorLight themes renamed to
+  paper-color-dark and paper-color-light, for consistency with other
+  theme names.
+
+
 ### Deprecated
 ### Removed
 ### Fixed
diff --git a/themes/Apprentice b/themes/apprentice
similarity index 100%
rename from themes/Apprentice
rename to themes/apprentice
diff --git a/themes/PaperColorDark b/themes/paper-color-dark
similarity index 100%
rename from themes/PaperColorDark
rename to themes/paper-color-dark
diff --git a/themes/PaperColorLight b/themes/paper-color-light
similarity index 100%
rename from themes/PaperColorLight
rename to themes/paper-color-light