diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@
 
 ## Unreleased
 
+## 0.6.3.1
+
 ## 0.6.3.0
 
 ## 0.6.2.1
diff --git a/waterfall-cad-examples.cabal b/waterfall-cad-examples.cabal
--- a/waterfall-cad-examples.cabal
+++ b/waterfall-cad-examples.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           waterfall-cad-examples
-version:        0.6.3.0
+version:        0.6.3.1
 synopsis:       Examples for Waterfall CAD, a Declarative CAD/Solid Modeling Library
 description:    Please see the README on GitHub at <https://github.com/joe-warren/opencascade-hs#readme>
 category:       Graphics
@@ -74,14 +74,14 @@
       base >=4.7 && <5
     , lens ==5.*
     , linear >=1.21 && <2
-    , opencascade-hs >=0.6.3.0 && <0.7
+    , opencascade-hs >=0.6.3.1 && <0.7
     , optparse-applicative >=0.17 && <0.19
     , parsec ==3.1.*
     , parser-combinators >=1.2 && <1.4
     , raw-strings-qq >=1.1 && <2
     , svg-tree >=0.6 && <1
-    , waterfall-cad >=0.6.3.0 && <0.7
-    , waterfall-cad-svg >=0.6.3.0 && <0.7
+    , waterfall-cad >=0.6.3.1 && <0.7
+    , waterfall-cad-svg >=0.6.3.1 && <0.7
     , xml ==1.*
   default-language: Haskell2010
 
@@ -96,15 +96,15 @@
       base >=4.7 && <5
     , lens ==5.*
     , linear >=1.21 && <2
-    , opencascade-hs >=0.6.3.0 && <0.7
+    , opencascade-hs >=0.6.3.1 && <0.7
     , optparse-applicative >=0.17 && <0.19
     , parsec ==3.1.*
     , parser-combinators >=1.2 && <1.4
     , raw-strings-qq >=1.1 && <2
     , svg-tree >=0.6 && <1
-    , waterfall-cad >=0.6.3.0 && <0.7
+    , waterfall-cad >=0.6.3.1 && <0.7
     , waterfall-cad-examples
-    , waterfall-cad-svg >=0.6.3.0 && <0.7
+    , waterfall-cad-svg >=0.6.3.1 && <0.7
     , xml ==1.*
   default-language: Haskell2010
 
@@ -127,7 +127,7 @@
     , lens ==5.*
     , linear >=1.21 && <2
     , mtl
-    , opencascade-hs >=0.6.3.0 && <0.7
+    , opencascade-hs >=0.6.3.1 && <0.7
     , optparse-applicative >=0.17 && <0.19
     , parsec ==3.1.*
     , parser-combinators >=1.2 && <1.4
@@ -139,8 +139,8 @@
     , tasty-golden
     , tasty-hunit
     , temporary
-    , waterfall-cad >=0.6.3.0 && <0.7
+    , waterfall-cad >=0.6.3.1 && <0.7
     , waterfall-cad-examples
-    , waterfall-cad-svg >=0.6.3.0 && <0.7
+    , waterfall-cad-svg >=0.6.3.1 && <0.7
     , xml ==1.*
   default-language: Haskell2010