diff --git a/specs/zlib.anod b/specs/zlib.anod
index b871254..909302f 100644
--- a/specs/zlib.anod
+++ b/specs/zlib.anod
@@ -10,7 +10,7 @@ import os
 class ZLib(spec("common")):
     @property
     def version(self):
-        return "1.3"
+        return "1.3.1"
 
     @property
     def tarball(self):
@@ -20,7 +20,7 @@ class ZLib(spec("common")):
     def source_pkg_build(self):
         return [
             self.HTTPSSourceBuilder(
-                name=self.tarball, url="https://zlib.net/current/%s" % self.tarball
+                name=self.tarball, url="https://zlib.net/%s" % self.tarball
             ),
         ]