diff --git a/Makefile b/Makefile
index 541d2cb..6fb81c1 100644
--- a/Makefile
+++ b/Makefile
@@ -4,5 +4,5 @@ sync:
 	pip-sync requirements.txt
 
 update:
-	pip-compile --quiet requirements.in --output-file requirements.txt
-	pip-compile --quiet requirements-dev.in --output-file requirements-dev.txt
+	pip-compile --allow-unsafe --quiet requirements.in --output-file requirements.txt
+	pip-compile --allow-unsafe --quiet requirements-dev.in --output-file requirements-dev.txt
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 7c3961a..4aa448f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,7 +2,7 @@
 # This file is autogenerated by pip-compile
 # To update, run:
 #
-#    pip-compile --output-file=requirements-dev.txt requirements-dev.in
+#    pip-compile --allow-unsafe --output-file=requirements-dev.txt requirements-dev.in
 #
 appdirs==1.4.3            # via black
 astroid==2.4.0            # via pylint
diff --git a/requirements.txt b/requirements.txt
index f4f6cd2..0e0c846 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 # This file is autogenerated by pip-compile
 # To update, run:
 #
-#    pip-compile --output-file=requirements.txt requirements.in
+#    pip-compile --allow-unsafe --output-file=requirements.txt requirements.in
 #
 certifi==2019.9.11        # via requests
 chardet==3.0.4            # via requests