diff --git a/conda/environments/deployment_docs.yml b/conda/environments/deployment_docs.yml
index 183340b5..4833ced7 100644
--- a/conda/environments/deployment_docs.yml
+++ b/conda/environments/deployment_docs.yml
@@ -10,10 +10,9 @@ dependencies:
   - pydata-sphinx-theme>=0.15.4
   - python=3.12
   - pre-commit>=3.8.0
-  # Upper bound pin on sphinx can be removed once https://github.com/mgaitan/sphinxcontrib-mermaid/issues/160 is resolved
-  - sphinx>=8.0.2,<8.1
+  - sphinx>=8.0.2
   - sphinx-autobuild>=2024.9.19
   - sphinx-copybutton>=0.5.2
   - sphinx-design>=0.6.1
-  - sphinxcontrib-mermaid>=0.9.2
+  - sphinxcontrib-mermaid>=1.0.0
   - python-frontmatter>=1.1.0