diff --git a/conda_requirements.txt b/conda_requirements.txt
index d2ac2df..a6d86a1 100644
--- a/conda_requirements.txt
+++ b/conda_requirements.txt
@@ -26,7 +26,7 @@ nbconvert==4.2.0
 nbformat==4.0.1
 ndg_httpsclient
 notebook==4.2.0
-numpy==1.11.0
+numpy==1.21.0
 pandas==0.18.1
 pandas-datareader==0.2.1
 pathlib2==2.1.0
diff --git a/py3_requirements.txt b/py3_requirements.txt
index 9161a23..8daf7a6 100644
--- a/py3_requirements.txt
+++ b/py3_requirements.txt
@@ -32,7 +32,7 @@ nbconvert==4.2.0
 nbformat==4.0.1
 ndg-httpsclient==0.4.0
 notebook==4.2.0
-numpy==1.11.0
+numpy==1.21.0
 oauthlib==1.1.1
 openpyxl==2.3.5
 pandas==0.18.1
diff --git a/py3_server_requirements.txt b/py3_server_requirements.txt
index c870d1e..9c8d52e 100644
--- a/py3_server_requirements.txt
+++ b/py3_server_requirements.txt
@@ -43,7 +43,7 @@ nbformat==4.0.1
 ndg-httpsclient==0.4.0
 nose==1.3.7
 notebook==4.2.0
-numpy==1.11.0
+numpy==1.21.0
 oauthenticator==0.5.0
 oauthlib==1.1.1
 openpyxl==2.3.5
diff --git a/requirements.txt b/requirements.txt
index ec17770..99a0c71 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ nbconvert==4.2.0
 nbformat==4.0.1
 ndg-httpsclient==0.4.0
 notebook==4.2.0
-numpy==1.11.0
+numpy==1.21.0
 oauthlib==1.1.1
 openpyxl==2.3.5
 pandas==0.18.1