diff --git a/environment.yml b/environment.yml
index d5f06bd..3536965 100644
--- a/environment.yml
+++ b/environment.yml
@@ -7,16 +7,17 @@ dependencies:
   - scipy>=1.5.2
   - setuptools>=51.3.3
   - pip:
-    - matplotlib>=3.3.3
-    - nose>=1.3.7
-    - parameterized>=0.8.1
-    - pytest>=6.2.4
-    - pytest-dependency>=0.5.1
-    - pytest-env>=0.6.2
-    - pytest-cov>=2.11.1
-    - sphinx==4.2.0
-    - breathe>=4.30.0
-    - sphinxcontrib-bibtex>=2.2.0
-    - coverage>=5.5
-    - argparse>=1.4
-    - h5py>=3.1
+     - matplotlib>=3.3.3
+     - nose>=1.3.7
+     - parameterized==0.8.1
+     - pytest>=6.2.4
+     - pytest-dependency>=0.5.1
+     - pytest-env>=0.6.2
+     - pytest-cov>=2.11.1
+     - sphinx>=7.0.0
+     - breathe>=4.30.0
+     - sphinxcontrib-bibtex>=2.2.0
+     - coverage>=5.5
+     - argparse>=1.4
+     - h5py>=3.1
+     - sphinx_rtd_theme>=1.0.0