diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,7 @@
-0.0.1
+0.0.4
+
+* Tighten dependencies.
+
+0.0.3
 
 * Initial.
diff --git a/stratux-websockets.cabal b/stratux-websockets.cabal
--- a/stratux-websockets.cabal
+++ b/stratux-websockets.cabal
@@ -1,5 +1,5 @@
 name:               stratux-websockets
-version:            0.0.3
+version:            0.0.4
 license:            BSD3
 license-file:       LICENCE
 author:             Tony Morris <ʇǝu˙sıɹɹoɯʇ@ןןǝʞsɐɥ>
@@ -26,7 +26,7 @@
                     Haskell2010
 
   build-depends:
-                      base < 5 && >= 3
+                      base < 5 && >= 4
                     , stratux-types >= 0.0.3 && < 0.1
                     , websockets >= 0.9 && < 1.0
                     , transformers >= 0.4 && < 1.0