diff --git a/setup.cfg b/setup.cfg
index f2f31dbf..a0f7eddc 100755
--- a/setup.cfg
+++ b/setup.cfg
@@ -38,7 +38,7 @@ install_requires =
     matplotlib==3.4.3
     numpy
     pandas==1.3.3
-    PyYAML==5.4.1
+    PyYAML
     requests
     scipy==1.7.0
 
@@ -50,7 +50,7 @@ dev =
     pre-commit
     pytest
 docs = 
-    Sphinx==4.2.0
+    Sphinx
     jupyter==1.0.0
     furo==2021.9.8
     nbsphinx==0.8.7