diff --git a/.travis.yml b/.travis.yml
index c7c69118..7c349ca2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,6 +26,7 @@ before_install:
   - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH
   - cabal --version
   - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
+  - sed -ie 's;-- secure: True;secure: False;g' $HOME/.cabal/config
   - travis_retry cabal update
   - git submodule update --remote
 
diff --git a/copilot-visualizer/CHANGELOG b/copilot-visualizer/CHANGELOG
index e4a74c50..4ccb59a2 100644
--- a/copilot-visualizer/CHANGELOG
+++ b/copilot-visualizer/CHANGELOG
@@ -1,3 +1,6 @@
+2026-08-23
+        * Fix inconsistent version bounds for `copilot` in Cabal file (#749).
+
 2026-07-07
         * Version bump (4.8). (#745)
 
diff --git a/copilot-visualizer/copilot-visualizer.cabal b/copilot-visualizer/copilot-visualizer.cabal
index 1bd88608..4284c988 100644
--- a/copilot-visualizer/copilot-visualizer.cabal
+++ b/copilot-visualizer/copilot-visualizer.cabal
@@ -121,7 +121,7 @@ executable tikz-example
   build-depends:
     base               >= 4.9 && < 5,
 
-    copilot            >= 4.7 && < 4.8,
+    copilot            >= 4.8 && < 4.9,
     copilot-visualizer
 
   if flag(examples)