diff --git a/bower.json b/bower.json
index 71925b5..3865089 100644
--- a/bower.json
+++ b/bower.json
@@ -18,9 +18,9 @@
     "package.json"
   ],
   "dependencies": {
-    "purescript-maybe":   "~0.2.1",
-    "purescript-tuples":  "~0.2.1",
-    "purescript-either":  "~0.1.3",
-    "purescript-strings": "~0.3.2"
+    "purescript-maybe": "~0.2.1",
+    "purescript-tuples": "~0.2.1",
+    "purescript-either": "~0.1.3",
+    "purescript-strings": "~0.4.0"
   }
 }