diff --git a/pandoc.cabal b/pandoc.cabal
index 9d84fae1e..0d81bcdf4 100644
--- a/pandoc.cabal
+++ b/pandoc.cabal
@@ -366,7 +366,7 @@ library
                  tagsoup >= 0.14.2 && < 0.15,
                  base64-bytestring >= 0.1 && < 1.1,
                  zlib >= 0.5 && < 0.7,
-                 skylighting >= 0.6 && < 0.7,
+                 skylighting >= 0.5.1 && < 0.7,
                  data-default >= 0.4 && < 0.8,
                  temporary >= 1.1 && < 1.3,
                  blaze-html >= 0.5 && < 0.10,
diff --git a/stack.lts9.yaml b/stack.lts9.yaml
index 5262e47d5..6c4bb294a 100644
--- a/stack.lts9.yaml
+++ b/stack.lts9.yaml
@@ -17,6 +17,7 @@ extra-deps:
 - hslua-0.9.5
 - hslua-module-text-0.1.2
 - skylighting-0.6
+- ansi-terminal-0.7.1.1
 - texmath-0.10.1
 - cmark-gfm-0.1.1
 - QuickCheck-2.10.0.1
diff --git a/stack.yaml b/stack.yaml
index 1730dd524..1e720ca6b 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -16,6 +16,7 @@ extra-deps:
 - pandoc-citeproc-0.13.0.1
 - hslua-0.9.5
 - skylighting-0.6
+- ansi-terminal-0.7.1.1
 - tasty-1.0.0.1
 ghc-options:
    "$locals": -fhide-source-paths