diff --git a/environment.yml b/environment.yml
index ebf6773..d5f06bd 100644
--- a/environment.yml
+++ b/environment.yml
@@ -7,16 +7,16 @@ 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
+    - 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
+    - breathe>=4.30.0
+    - sphinxcontrib-bibtex>=2.2.0
+    - coverage>=5.5
+    - argparse>=1.4
+    - h5py>=3.1