diff --git a/modulesets-stable/gtk-osx-bootstrap.modules b/modulesets-stable/gtk-osx-bootstrap.modules
index 7d72f9dc..b62a695e 100644
--- a/modulesets-stable/gtk-osx-bootstrap.modules
+++ b/modulesets-stable/gtk-osx-bootstrap.modules
@@ -39,10 +39,9 @@
   <autotools id="libpng"
              autogen-sh="configure"
              autogenargs="--enable-shared">
-    <branch module="libpng/libpng-1.6.38.tar.xz"
-            version="1.6.38"
-            hash="sha256:b3683e8b8111ebf6f1ac004ebb6b0c975cd310ec469d98364388e9cedbfa68be"
-            repo="sourceforge" />
+    <branch version="1.6.39" module="libpng/libpng-1.6.39.tar.xz"
+            hash="sha256:1f4696ce70b4ee5f85f1e1623dc1229b210029fa4b7aee573df3e2ba7b036937"
+            repo="sourceforge"/>
     <dependencies>
       <dep package="zlib" />
     </dependencies>
diff --git a/modulesets-unstable/gtk-osx-bootstrap.modules b/modulesets-unstable/gtk-osx-bootstrap.modules
index 5c3c0bbd..1320de7d 100644
--- a/modulesets-unstable/gtk-osx-bootstrap.modules
+++ b/modulesets-unstable/gtk-osx-bootstrap.modules
@@ -18,8 +18,8 @@
   <repository type="tarball" name="github-tarball" href="https://github.com/"/>
 
   <autotools id="libpng" autogenargs="--enable-shared" autogen-sh="configure">
-    <branch version="1.6.38" module="libpng/libpng-1.6.38.tar.xz"
-            hash="sha256:b3683e8b8111ebf6f1ac004ebb6b0c975cd310ec469d98364388e9cedbfa68be"
+    <branch version="1.6.39" module="libpng/libpng-1.6.39.tar.xz"
+            hash="sha256:1f4696ce70b4ee5f85f1e1623dc1229b210029fa4b7aee573df3e2ba7b036937"
             repo="sourceforge"/>
     <dependencies>
       <dep package="zlib"/>
diff --git a/modulesets/gtk-osx-bootstrap.modules b/modulesets/gtk-osx-bootstrap.modules
index 7be13178..5ca67f8f 100644
--- a/modulesets/gtk-osx-bootstrap.modules
+++ b/modulesets/gtk-osx-bootstrap.modules
@@ -18,8 +18,8 @@
   <repository type="tarball" name="github-tarball" href="https://github.com/"/>
 
   <autotools id="libpng" autogenargs="--enable-shared" autogen-sh="configure">
-    <branch version="1.6.38" module="libpng/libpng-1.6.38.tar.xz"
-            hash="sha256:b3683e8b8111ebf6f1ac004ebb6b0c975cd310ec469d98364388e9cedbfa68be"
+    <branch version="1.6.39" module="libpng/libpng-1.6.39.tar.xz"
+            hash="sha256:1f4696ce70b4ee5f85f1e1623dc1229b210029fa4b7aee573df3e2ba7b036937"
             repo="sourceforge"/>
     <dependencies>
       <dep package="zlib"/>