diff --git a/vendor/nim-ssz-serialization b/vendor/nim-ssz-serialization
index 3cd8d2d6b..66745f23b 160000
--- a/vendor/nim-ssz-serialization
+++ b/vendor/nim-ssz-serialization
@@ -1 +1 @@
-Subproject commit 3cd8d2d6b80bde0ce7f25609cb5cb9fc37852fe2
+Subproject commit 66745f23b5d64c79f0f24af95eb63c47a71f8dbf
diff --git a/vendor/nim-stew b/vendor/nim-stew
index 17cd8c846..d2ae2889e 160000
--- a/vendor/nim-stew
+++ b/vendor/nim-stew
@@ -1 +1 @@
-Subproject commit 17cd8c846fd6238f074b67875d17617c90ccace5
+Subproject commit d2ae2889e8738e46c0cbb90402e62e0cefe62790