diff --git a/Dockerfile b/Dockerfile
index 43ed46f..66dd309 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,8 +10,9 @@ RUN git clone https://gitea.purpleraft.com/external-repos/ivatar.git .
 
 RUN virtualenv -p python3 .virtualenv && \
     source .virtualenv/bin/activate && \
+    pip install --upgrade pip setuptools wheel && \
     pip install 2to3 pillow && \
-    pip install -r requirements.txt
+    pip install --no-build-isolation -r requirements.txt
 
 RUN apk del build-deps && pip cache purge