diff --git a/requirements.txt b/requirements.txt
index 3fa13db37..acfd0fd42 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,4 @@ unicodedata2==11.0.0; python_version < '3.7' and platform_python_implementation
 scipy==1.2.1; platform_python_implementation != "PyPy"
 munkres==1.0.12; platform_python_implementation == "PyPy"
 zopfli==0.1.6
-fs==2.2.1
+fs==2.3.1