diff --git a/ext/commonmarker/cmark-upstream b/ext/commonmarker/cmark-upstream
index f649003e..ea2a07d0 160000
--- a/ext/commonmarker/cmark-upstream
+++ b/ext/commonmarker/cmark-upstream
@@ -1 +1 @@
-Subproject commit f649003ec8db28a6dbaf1a92443365649adcb04f
+Subproject commit ea2a07d050329d211af437ea5f9b5c45804a40d8
diff --git a/ext/commonmarker/houdini_href_e.c b/ext/commonmarker/houdini_href_e.c
index 9152803d..8c38d2fb 100644
--- a/ext/commonmarker/houdini_href_e.c
+++ b/ext/commonmarker/houdini_href_e.c
@@ -7,7 +7,7 @@
 /*
  * The following characters will not be escaped:
  *
- *		-_.+!*'(),%#@?=;:/,+&$ alphanum
+ *		-_.+!*'(),%#@?=;:/,+&$~ alphanum
  *
  * Note that this character set is the addition of:
  *
@@ -35,7 +35,7 @@ static const char HREF_SAFE[] = {
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1,
     0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-    1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,