diff --git a/vendor/doctest b/vendor/doctest
index 666e648b..53efdc5f 160000
--- a/vendor/doctest
+++ b/vendor/doctest
@@ -1 +1 @@
-Subproject commit 666e648b68fda2deb141a1fe93e3fd1e2795dd0f
+Subproject commit 53efdc5f6ad44cc8488636ec250e0a9774261c90
diff --git a/vendor/valgrind b/vendor/valgrind
index a584b7ed..ead0281a 160000
--- a/vendor/valgrind
+++ b/vendor/valgrind
@@ -1 +1 @@
-Subproject commit a584b7ed2384b238c5e274309e36195b64e54516
+Subproject commit ead0281a94b393e55e3fad0969f561f1b1a93200
diff --git a/vendor/zlib b/vendor/zlib
index 11c0505f..5d8219ff 160000
--- a/vendor/zlib
+++ b/vendor/zlib
@@ -1 +1 @@
-Subproject commit 11c0505fd26300b53bc7272078dc173130ee0efe
+Subproject commit 5d8219ff63668a8bbdbb7639284569a98ea6361c