diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c8d17895..845c7f7e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,11 +30,6 @@ jobs:
             python-version: 3.8
             toxenv: py38
 
-          - name: Python 3.7
-            runs-on: ubuntu-latest
-            python-version: 3.7
-            toxenv: py37
-
           - name: Coverage
             runs-on: ubuntu-latest
             python-version: 3.8
diff --git a/CHANGES.rst b/CHANGES.rst
index 31ca5efc..7b411f38 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,8 @@
 0.3.4 (unreleased)
 ==================
 
+- Update astropy min version to 5.0.4. [#52]
+
 0.3.3 (2022-04-07)
 ==================
 
diff --git a/setup.cfg b/setup.cfg
index 2ee1abda..88222113 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -23,7 +23,7 @@ setup_requires =
 install_requires =
     asdf>=2.7.1
     crds>=7.4.1.3
-    astropy>=4.0
+    astropy>=5.0.4
     stdatamodels>=0.2.4
 package_dir =
     =src