diff --git a/vendor/doctest b/vendor/doctest
index dfa6d0e4..08aa4d3b 160000
--- a/vendor/doctest
+++ b/vendor/doctest
@@ -1 +1 @@
-Subproject commit dfa6d0e4014c45b5f94261531d12c4629b82e41f
+Subproject commit 08aa4d3b167d75a30e7ffa25ddbce6f69f283ac0
diff --git a/vendor/valgrind b/vendor/valgrind
index 5a703781..50ae1c9d 160000
--- a/vendor/valgrind
+++ b/vendor/valgrind
@@ -1 +1 @@
-Subproject commit 5a7037818b97dc50af556e5850cb1f768824d86f
+Subproject commit 50ae1c9d3a09289ff103942879d52c47cba79edc
diff --git a/vendor/zlib b/vendor/zlib
index d5a1e143..460622b2 160000
--- a/vendor/zlib
+++ b/vendor/zlib
@@ -1 +1 @@
-Subproject commit d5a1e143b13973d3289595bbafdfe3168eb0ecd3
+Subproject commit 460622b25ac8b5def9018d2e230cf63fc715822b