diff --git a/Dockerfile b/Dockerfile
index 6a56801..e8babba 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,7 @@ RUN cd Cbc-2.9.8 && \
     ./configure && \
     make && \
     make install
+RUN python -m pip install pydantic
 RUN python -m pip install pySqsListener
 
 # Bundle app source
@@ -23,4 +24,5 @@ ENV MEASURE_PROCESSED_BUCKET measure-development-solver-processed
 ENV SOLVER_SQS_INGEST_QUEUE https://sqs.ca-central-1.amazonaws.com/455309353401/measure-development-solver-ingest
 ENV SOLVER_AWS_REGION ca-central-1
 
-CMD [ "python", "main.py" ]
+# CMD [ "python", "main.py" ]
+CMD tail -f /dev/null
diff --git a/app/main.py b/app/main.py
index 94ae560..d64b551 100644
--- a/app/main.py
+++ b/app/main.py
@@ -3,7 +3,7 @@ import os
 from services.loft import Loft
 from helpers import aws_helper
 
-print("Starting Solver Service (v0.3.0)...")
+print("Starting Solver Service (v0.3.1)...")
 
 # listen to the solver queue
 while True:
diff --git a/docker_tag.txt b/docker_tag.txt
index 0ea3a94..9e11b32 100644
--- a/docker_tag.txt
+++ b/docker_tag.txt
@@ -1 +1 @@
-0.2.0
+0.3.1