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
 
 - the SVG CSS now declares the Path fill opacity as 0
diff --git a/waterfall-cad-svg.cabal b/waterfall-cad-svg.cabal
--- a/waterfall-cad-svg.cabal
+++ b/waterfall-cad-svg.cabal
@@ -1,11 +1,11 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.39.1.
+-- This file has been generated from package.yaml by hpack version 0.39.6.
 --
 -- see: https://github.com/sol/hpack
 
 name:           waterfall-cad-svg
-version:        0.6.3.0
+version:        0.6.3.1
 synopsis:       Declarative CAD/Solid Modeling Library, SVG Support
 description:    Please see the README on GitHub at <https://github.com/joe-warren/opencascade-hs#readme>
 category:       Graphics
@@ -45,11 +45,11 @@
     , base >=4.7 && <5
     , lens ==5.*
     , linear >=1.0 && <2
-    , opencascade-hs >=0.6.3.0 && <0.7
+    , opencascade-hs >=0.6.3.1 && <0.7
     , resourcet >=1.2 && <1.4
     , svg-tree >=0.6 && <1
     , text >=1.2 && <3
-    , waterfall-cad >=0.6.3.0 && <0.7
+    , waterfall-cad >=0.6.3.1 && <0.7
   default-language: Haskell2010
 
 test-suite tests
@@ -66,12 +66,12 @@
     , base >=4.7 && <5
     , lens ==5.*
     , linear >=1.0 && <2
-    , opencascade-hs >=0.6.3.0 && <0.7
+    , opencascade-hs >=0.6.3.1 && <0.7
     , resourcet >=1.2 && <1.4
     , svg-tree >=0.6 && <1
     , tasty
     , tasty-hunit
     , text >=1.2 && <3
-    , waterfall-cad >=0.6.3.0 && <0.7
+    , waterfall-cad >=0.6.3.1 && <0.7
     , waterfall-cad-svg
   default-language: Haskell2010