diff --git a/.hgsigs b/.hgsigs
deleted file mode 100755
index dde04c4..0000000
--- a/.hgsigs
+++ /dev/null
@@ -1 +0,0 @@
-3021b706cfed3a2d2a6ed870ed62adc6c35890ea 0 iEYEABECAAYFAlDbTJUACgkQujfFGyf8WtdXIgCgoNWu7VoxUcaz/OkNAI+2L5gw9bgAn0Tcrwb6kCnGfhAK6as7p4MjbRaa
diff --git a/galacticusInstall.sh b/galacticusInstall.sh
index 0d6cf4a..cad14e2 100755
--- a/galacticusInstall.sh
+++ b/galacticusInstall.sh
@@ -571,7 +571,7 @@ iPackage=$(expr $iPackage + 1)
       maxVersion[$iPackage]="9.9.9"
       yumInstall[$iPackage]="zlib-devel"
       aptInstall[$iPackage]="zlib1g-dev"
-       sourceURL[$iPackage]="http://zlib.net/zlib-1.2.8.tar.gz"
+       sourceURL[$iPackage]="http://zlib.net/zlib-1.3.tar.gz"
 buildEnvironment[$iPackage]=""
    buildInOwnDir[$iPackage]=0
    configOptions[$iPackage]="--prefix=$toolInstallPath"