diff --git a/src/sphinx_book_theme/header_buttons/launch.py b/src/sphinx_book_theme/header_buttons/launch.py
index 20f93b4c..1cab0712 100644
--- a/src/sphinx_book_theme/header_buttons/launch.py
+++ b/src/sphinx_book_theme/header_buttons/launch.py
@@ -120,7 +120,7 @@ def add_launch_buttons(
         # Any non-standard repository URL should be passed-through raw
         if provider_url not in ["https://github.com", "https://gitlab.com"]:
             # Generic git repository using the full repo URL as a fallback
-            url = f"{binderhub_url}/v2/git/{quote(repo_url)}/{branch}"
+            url = f"{binderhub_url}/v2/git/{quote(repo_url, safe='')}/{branch}"
         elif provider.lower() == "github":
             url = f"{binderhub_url}/v2/gh/{org}/{repo}/{branch}"
         elif provider.lower() == "gitlab":
diff --git a/tests/test_build/header__launch-buttons--bitbucket.html b/tests/test_build/header__launch-buttons--bitbucket.html
index f6447ef3..c689490d 100644
--- a/tests/test_build/header__launch-buttons--bitbucket.html
+++ b/tests/test_build/header__launch-buttons--bitbucket.html
@@ -1,7 +1,7 @@
 section1/ntbk.html
-https://mybinder.org/v2/git/https%3A//opensource.ncsa.illinois.edu/bitbucket/scm/u3d/3dutilities/foo?urlpath=tree/docs/section1/ntbk.ipynb
+https://mybinder.org/v2/git/https%3A%2F%2Fopensource.ncsa.illinois.edu%2Fbitbucket%2Fscm%2Fu3d%2F3dutilities/foo?urlpath=tree/docs/section1/ntbk.ipynb
 https://hub.myorg.edu/hub/user-redirect/git-pull?repo=https%3A//opensource.ncsa.illinois.edu/bitbucket/scm/u3d/3dutilities&urlpath=tree/3dutilities/docs/section1/ntbk.ipynb&branch=foo
 
 section1/ntbkmd.html
-https://mybinder.org/v2/git/https%3A//opensource.ncsa.illinois.edu/bitbucket/scm/u3d/3dutilities/foo?urlpath=tree/docs/section1/ntbkmd.md
+https://mybinder.org/v2/git/https%3A%2F%2Fopensource.ncsa.illinois.edu%2Fbitbucket%2Fscm%2Fu3d%2F3dutilities/foo?urlpath=tree/docs/section1/ntbkmd.md
 https://hub.myorg.edu/hub/user-redirect/git-pull?repo=https%3A//opensource.ncsa.illinois.edu/bitbucket/scm/u3d/3dutilities&urlpath=tree/3dutilities/docs/section1/ntbkmd.md&branch=foo
diff --git a/tests/test_build/header__launch-buttons--gitlab_manual.html b/tests/test_build/header__launch-buttons--gitlab_manual.html
index 962286d6..1d81c79c 100644
--- a/tests/test_build/header__launch-buttons--gitlab_manual.html
+++ b/tests/test_build/header__launch-buttons--gitlab_manual.html
@@ -1,7 +1,7 @@
 section1/ntbk.html
-https://mybinder.org/v2/git/https%3A//mywebsite.com/gitlab/gitlab-org/gitlab/foo?urlpath=tree/docs/section1/ntbk.ipynb
+https://mybinder.org/v2/git/https%3A%2F%2Fmywebsite.com%2Fgitlab%2Fgitlab-org%2Fgitlab/foo?urlpath=tree/docs/section1/ntbk.ipynb
 https://hub.myorg.edu/hub/user-redirect/git-pull?repo=https%3A//mywebsite.com/gitlab/gitlab-org/gitlab&urlpath=tree/gitlab/docs/section1/ntbk.ipynb&branch=foo
 
 section1/ntbkmd.html
-https://mybinder.org/v2/git/https%3A//mywebsite.com/gitlab/gitlab-org/gitlab/foo?urlpath=tree/docs/section1/ntbkmd.md
+https://mybinder.org/v2/git/https%3A%2F%2Fmywebsite.com%2Fgitlab%2Fgitlab-org%2Fgitlab/foo?urlpath=tree/docs/section1/ntbkmd.md
 https://hub.myorg.edu/hub/user-redirect/git-pull?repo=https%3A//mywebsite.com/gitlab/gitlab-org/gitlab&urlpath=tree/gitlab/docs/section1/ntbkmd.md&branch=foo