diff --git a/application/app/middleware.py b/application/app/middleware.py
new file mode 100644
index 0000000..43acf6c
--- /dev/null
+++ b/application/app/middleware.py
@@ -0,0 +1,11 @@
+
+# Define CSP middleware:
+
+def csp_middleware(get_response):
+
+    def middleware(request):
+        response = get_response(request)
+        response["content-security-policy"] = "default-src 'self'"
+        return response
+
+    return middleware
diff --git a/application/drinks_manager/settings.py b/application/drinks_manager/settings.py
index 2a6674d..6dc0a14 100644
--- a/application/drinks_manager/settings.py
+++ b/application/drinks_manager/settings.py
@@ -67,7 +67,7 @@ MIDDLEWARE = [
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
     "django_currentuser.middleware.ThreadLocalUserMiddleware",
-    "csp.middleware.CSPMiddleware"
+    "app.middleware.csp_middleware"
 ]
 
 ROOT_URLCONF = 'drinks_manager.urls'
diff --git a/pip-dependencies.txt b/pip-dependencies.txt
index 3107a0b..da50c9d 100644
--- a/pip-dependencies.txt
+++ b/pip-dependencies.txt
@@ -1,5 +1,4 @@
 django~=3.2.7
 django-currentuser==0.5.3
-django-csp==3.7
 psycopg2~=2.9.1
 uvicorn~=0.17.6