diff --git a/Makefile b/Makefile
index fa5a2a65..95db5293 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@ clean:
 	rm -Rf build/
 
 install:
-	pip install -e .[dev]
+	pip install -e .[dev] --upgrade --upgrade-strategy=eager --pre
 
 sandbox: install
 	python sandbox/manage.py migrate
diff --git a/setup.py b/setup.py
index 7225e09f..ff053feb 100755
--- a/setup.py
+++ b/setup.py
@@ -54,7 +54,7 @@
     ],
     # mark test target to require extras.
     extras_require={
-        "dev": ["coverage", "mock", "twine", "wheel", "easy_thumbnails"],
+        "dev": ["coverage", "mock", "twine", "wheel", "sorl-thumbnail"],
         "lint": ["pylint", "pylint-django", "black>=23.1.0"],
     },
 )