diff --git a/conda_requirements.txt b/conda_requirements.txt
index d2ac2df..16c01e8 100644
--- a/conda_requirements.txt
+++ b/conda_requirements.txt
@@ -13,7 +13,7 @@ ipython==4.2.0
 ipython_genutils==0.1.0
 ipywidgets
 jdcal==1.2
-Jinja2==2.8
+Jinja2==2.11.3
 jsonschema==2.5.1
 jupyter==1.0.0
 jupyter_client==4.2.2
diff --git a/py3_requirements.txt b/py3_requirements.txt
index 9161a23..66940d0 100644
--- a/py3_requirements.txt
+++ b/py3_requirements.txt
@@ -18,7 +18,7 @@ ipython==4.2.0
 ipython-genutils==0.1.0
 ipywidgets==5.1.3
 jdcal==1.2
-Jinja2==2.8
+Jinja2==2.11.3
 jsonschema==2.5.1
 jupyter==1.0.0
 jupyter-client==4.2.2
diff --git a/py3_server_requirements.txt b/py3_server_requirements.txt
index c870d1e..1ae3b7e 100644
--- a/py3_server_requirements.txt
+++ b/py3_server_requirements.txt
@@ -25,7 +25,7 @@ ipython==4.2.0
 ipython-genutils==0.1.0
 ipywidgets==5.1.3
 jdcal==1.2
-Jinja2==2.8
+Jinja2==2.11.3
 jsonschema==2.5.1
 jupyter==1.0.0
 jupyter-client==4.2.2
diff --git a/requirements.txt b/requirements.txt
index ec17770..9c78195 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ ipython==4.2.0
 ipython-genutils==0.1.0
 ipywidgets==5.1.3
 jdcal==1.2
-Jinja2==2.8
+Jinja2==2.11.3
 jsonschema==2.5.1
 jupyter==1.0.0
 jupyter-client==4.2.2