diff --git a/Makefile b/Makefile
index a13024bd4..3cf47557d 100644
--- a/Makefile
+++ b/Makefile
@@ -95,7 +95,7 @@ test: test.unit test.integration test.quality ## Run all tests
 	tox -e translations
 
 # Define PIP_COMPILE_OPTS=-v to get more information during make upgrade.
-PIP_COMPILE = pip-compile --upgrade --resolver=backtracking $(PIP_COMPILE_OPTS)
+PIP_COMPILE = pip-compile --upgrade $(PIP_COMPILE_OPTS)
 
 upgrade: export CUSTOM_COMPILE_COMMAND=make upgrade
 upgrade: ## update the requirements/*.txt files with the latest packages satisfying requirements/*.in