diff --git a/requirements.txt b/requirements.txt
index a4a39682..83524383 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ apipkg==1.5
 asn1crypto==1.0.1
 atomicwrites==1.2.1
 attrs==18.2.0
-Babel==2.7.0
+Babel==2.9.1
 backports.functools-lru-cache==1.5
 bcrypt==3.1.7
 blessings==1.6.1
diff --git a/webservices_rpi_arduino_comm/requirements.txt b/webservices_rpi_arduino_comm/requirements.txt
index 285161ff..8bffd6e9 100644
--- a/webservices_rpi_arduino_comm/requirements.txt
+++ b/webservices_rpi_arduino_comm/requirements.txt
@@ -4,7 +4,7 @@ apipkg==1.5
 asn1crypto==1.0.1
 atomicwrites==1.2.1
 attrs==18.2.0
-Babel==2.7.0
+Babel==2.9.1
 backports.functools-lru-cache==1.5
 bcrypt==3.1.7
 blessings==1.6.1