diff --git a/deb/stack.yaml b/deb/stack.yaml
index 4fe39fb26..b3b6419cc 100644
--- a/deb/stack.yaml
+++ b/deb/stack.yaml
@@ -18,4 +18,5 @@ extra-deps:
 - pandoc-citeproc-0.10.1
 - http-client-0.5.0
 - http-client-tls-0.3.0
+- 'cmark-0.5.3'
 resolver: lts-6.5
diff --git a/osx/stack.yaml b/osx/stack.yaml
index b83a6b8df..e4be1b497 100644
--- a/osx/stack.yaml
+++ b/osx/stack.yaml
@@ -21,4 +21,5 @@ extra-deps:
 - 'http-client-0.5.0'
 - 'http-client-tls-0.3.0'
 - 'data-default-instances-base-0.1.0.1'
+- 'cmark-0.5.3'
 resolver: nightly-2016-07-11
diff --git a/stack.yaml b/stack.yaml
index c0d06a84d..ec3624d9b 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -11,4 +11,5 @@ extra-deps:
 - http-client-0.5.0
 - http-client-tls-0.3.0
 - data-default-instances-base-0.1.0.1
+- cmark-0.5.3
 resolver: nightly-2016-07-11
diff --git a/windows/stack.yaml b/windows/stack.yaml
index 56cf81752..31c95040b 100644
--- a/windows/stack.yaml
+++ b/windows/stack.yaml
@@ -18,4 +18,5 @@ extra-deps:
 - 'pandoc-citeproc-0.10.1'
 - 'http-client-0.5.0'
 - 'http-client-tls-0.3.0'
+- 'cmark-0.5.3'
 resolver: lts-6.5