diff --git a/routes/avatars.js b/routes/avatars.js
index 93f0d65..b0b2f3a 100644
--- a/routes/avatars.js
+++ b/routes/avatars.js
@@ -33,8 +33,8 @@ router.get("/:uuid.:ext?", function(req, res) {
     return;
   }
 
-  // strip dashes
-  uuid = uuid.replace(/-/g, "");
+  // strip dashes, to lower case
+  uuid = uuid.replace(/-/g, "").toLowerCase();
 
   try {
     helpers.get_avatar(uuid, helm, size, function(err, status, image, hash) {
diff --git a/routes/skins.js b/routes/skins.js
index 1680cfa..7ac2c91 100644
--- a/routes/skins.js
+++ b/routes/skins.js
@@ -18,8 +18,8 @@ router.get("/:uuid.:ext?", function(req, res) {
     return;
   }
 
-  // strip dashes
-  uuid = uuid.replace(/-/g, "");
+  // strip dashes, to lower case
+  uuid = uuid.replace(/-/g, "").toLowerCase();
 
   try {
     helpers.get_skin(uuid, function(err, hash, image) {