diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,3 +36,7 @@
 **v0.2.1.4**
 
   * Support GHC 8.10
+
+**v0.2.1.6**
+
+  * Support `doctest-0.17`
diff --git a/d10.cabal b/d10.cabal
--- a/d10.cabal
+++ b/d10.cabal
@@ -1,5 +1,5 @@
 name: d10
-version: 0.2.1.4
+version: 0.2.1.6
 category: Data
 synopsis: Digits 0-9
 
@@ -93,4 +93,4 @@
 
   build-depends:
       base             >= 4.10 && < 4.15
-    , doctest          >= 0.13 && < 0.17
+    , doctest          >= 0.13 && < 0.18