diff --git a/vendor/doctest b/vendor/doctest
index 661b7f1e..7e8fcdf5 160000
--- a/vendor/doctest
+++ b/vendor/doctest
@@ -1 +1 @@
-Subproject commit 661b7f1ee3a8f9f85936e05b1f31692c3a1302ed
+Subproject commit 7e8fcdf53f3698d16b1b06b83ead87998ced8ebb
diff --git a/vendor/valgrind b/vendor/valgrind
index 5d06e960..4edff008 160000
--- a/vendor/valgrind
+++ b/vendor/valgrind
@@ -1 +1 @@
-Subproject commit 5d06e9606f86ed4c3bb1664f09921249f6fd490a
+Subproject commit 4edff0085c968515309446620901468a4a6eee96
diff --git a/vendor/zlib b/vendor/zlib
index 460622b2..19c1c0a0 160000
--- a/vendor/zlib
+++ b/vendor/zlib
@@ -1 +1 @@
-Subproject commit 460622b25ac8b5def9018d2e230cf63fc715822b
+Subproject commit 19c1c0a04240747492b108f6f29eeac5530c6f34