diff --git a/Dockerfile b/Dockerfile
index 4609db7..0217013 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,8 +17,8 @@ RUN apt-get update && apt-get install -y \
 # Copy the requirements file into the container
 COPY requirements.txt .
 
-# Every pip install takes package versions from constraints.txt, the package list of the v2.3.1 image
-COPY constraints.txt .
+# Every pip install takes package versions from docker/constraints.txt.
+COPY docker/constraints.txt .
 ENV PIP_CONSTRAINT=/usr/src/app/constraints.txt
 
 # Install base requirements
diff --git a/constraints.txt b/docker/constraints.txt
similarity index 100%
rename from constraints.txt
rename to docker/constraints.txt