diff --git a/.gitmodules b/.gitmodules
index cd332cc3..dd4c189f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,7 +10,7 @@
 	branch = develop
 [submodule "external/bzip2"]
 	path = external/bzip2
-	url = git://sourceware.org/git/bzip2.git
+	url = https://sourceware.org/git/bzip2.git
 	branch = master
 [submodule "external/xz"]
 	path = external/xz
diff --git a/LibZipSharp.props b/LibZipSharp.props
index 09303f8f..0b31a8b2 100644
--- a/LibZipSharp.props
+++ b/LibZipSharp.props
@@ -1,6 +1,6 @@
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <_LibZipSharpAssemblyVersion>2.0.5</_LibZipSharpAssemblyVersion>
+    <_LibZipSharpAssemblyVersion>2.0.6</_LibZipSharpAssemblyVersion>
     <!--
       Nuget Version. You can append things like -alpha-1 etc to this value.
       But always leave the $(_LibZipSharpAssemblyVersion) value at the start.
diff --git a/external/libzip b/external/libzip
index 26ba5523..5532f9ba 160000
--- a/external/libzip
+++ b/external/libzip
@@ -1 +1 @@
-Subproject commit 26ba5523db09213f532821875542dba7afa04b65
+Subproject commit 5532f9baa0c44cc5435ad135686a4ea009075b9a
diff --git a/external/zlib b/external/zlib
index cacf7f1d..21767c65 160000
--- a/external/zlib
+++ b/external/zlib
@@ -1 +1 @@
-Subproject commit cacf7f1d4e3d44d871b605da3b647f07d718623f
+Subproject commit 21767c654d31d2dccdde4330529775c6c5fd5389