diff --git a/contrib/boost b/contrib/boost
index 6883b40449f..6a96e8b59f7 160000
--- a/contrib/boost
+++ b/contrib/boost
@@ -1 +1 @@
-Subproject commit 6883b40449f378019aec792f9983ce3afc7ff16e
+Subproject commit 6a96e8b59f76148eb8ad54a9d15259f8ce84c606
diff --git a/contrib/librdkafka b/contrib/librdkafka
index 7478b5ef16a..363dcad5a23 160000
--- a/contrib/librdkafka
+++ b/contrib/librdkafka
@@ -1 +1 @@
-Subproject commit 7478b5ef16aadd6543fe38bc6a2deb895c70da98
+Subproject commit 363dcad5a23dc29381cc626620e68ae418b3af19
diff --git a/contrib/mariadb-connector-c b/contrib/mariadb-connector-c
index a0fd36cc5a5..d85d0e98999 160000
--- a/contrib/mariadb-connector-c
+++ b/contrib/mariadb-connector-c
@@ -1 +1 @@
-Subproject commit a0fd36cc5a5313414a5a2ebe9322577a29b4782a
+Subproject commit d85d0e98999cd9e28ceb66645999b4a9ce85370e
diff --git a/contrib/ssl b/contrib/ssl
index dbbbcdbbd17..ba8de796195 160000
--- a/contrib/ssl
+++ b/contrib/ssl
@@ -1 +1 @@
-Subproject commit dbbbcdbbd17785566f8f9c107b714f9e213d7293
+Subproject commit ba8de796195ff9d8bb0249ce289b83226b848b77