diff --git a/autobuild.xml b/autobuild.xml
index 308d0acacd23b5726f1f1a54e35198dfe669b248..0a66bb903bf5fe7ae9aacfcf038b27c08d5743b0 100644
--- a/autobuild.xml
+++ b/autobuild.xml
@@ -110,9 +110,9 @@
         </map>
       </map>
       <key>source_directory</key>
-      <string>zlib-1.2.5</string>
+      <string>zlib-1.2.6</string>
       <key>version</key>
-      <string>1.2.5</string>
+      <string>1.2.6</string>
     </map>
     <key>type</key>
     <string>autobuild</string>
diff --git a/build-cmd.sh b/build-cmd.sh
index f41cbf261b70fb8e2ae7b27c763da2ff24f803e7..93200ceb818a4e78235f6fdafc358fb7d14cf65d 100755
--- a/build-cmd.sh
+++ b/build-cmd.sh
@@ -7,7 +7,7 @@ set -x
 # make errors fatal
 set -e
 
-ZLIB_VERSION="1.2.5"
+ZLIB_VERSION="1.2.6"
 ZLIB_SOURCE_DIR="zlib-$ZLIB_VERSION"
 
 if [ -z "$AUTOBUILD" ] ; then