diff --git a/Dockerfile b/Dockerfile
index d559b0d8..30f42739 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,7 @@ ARG AIRBRAKE_PROJECT_KEY
 ARG BANDIERA_URL
 ARG APPLICATION_INSIGHTS_INSTRUMENTATION_KEY
 ARG RAILS_LOG_TO_STDOUT
+ARG SECRET_KEY_BASE
 ARG RACK_ENV=production
 
 # Add Gemfiles.
@@ -52,6 +53,7 @@ ENV BANDIERA_URL $BANDIERA_URL
 ENV APPLICATION_INSIGHTS_INSTRUMENTATION_KEY $APPLICATION_INSIGHTS_INSTRUMENTATION_KEY
 ENV RAILS_LOG_TO_STDOUT $RAILS_LOG_TO_STDOUT
 ENV RACK_ENV $RACK_ENV
+ENV SECRET_KEY_BASE $SECRET_KEY_BASE
 ENV RAILS_SERVE_STATIC_FILES true
 
 # Add additional labels to our image
diff --git a/Makefile b/Makefile
index 4a9d6379..89678e1d 100644
--- a/Makefile
+++ b/Makefile
@@ -82,6 +82,7 @@ build: # Using the variables defined above, run `docker build`, tagging the imag
 		--build-arg BANDIERA_URL=$(BANDIERA_URL) \
 		--build-arg APPLICATION_INSIGHTS_INSTRUMENTATION_KEY=$(APPLICATION_INSIGHTS_INSTRUMENTATION_KEY) \
 		--build-arg RAILS_LOG_TO_STDOUT=$(RAILS_LOG_TO_STDOUT) \
+		--build-arg SECRET_KEY_BASE=$(SECRET_KEY_BASE) \
 		--build-arg RACK_ENV=$(RACK_ENV) \
 		--build-arg GIT_SHA="$(GIT_SHA)" \
 		--build-arg GIT_TAG="$(GIT_TAG)" \