diff --git a/intro-dnac/requirements.txt b/intro-dnac/requirements.txt
index 6718a3e..9bfee9e 100644
--- a/intro-dnac/requirements.txt
+++ b/intro-dnac/requirements.txt
@@ -1,3 +1,3 @@
 ciscosparkapi==0.9.2
 requests==2.18.4
-urllib3==1.22
+urllib3==1.26.5
diff --git a/intro-mdp/requirements.txt b/intro-mdp/requirements.txt
index 91265bb..d2569b8 100644
--- a/intro-mdp/requirements.txt
+++ b/intro-mdp/requirements.txt
@@ -3,5 +3,5 @@ ncclient==0.6.4
 netmiko==1.4.2
 pyang==1.7.4
 requests==2.18.4
-urllib3==1.22
+urllib3==1.26.5
 xmltodict==0.11.0
diff --git a/intro-nfvis/requirements.txt b/intro-nfvis/requirements.txt
index 6718a3e..9bfee9e 100644
--- a/intro-nfvis/requirements.txt
+++ b/intro-nfvis/requirements.txt
@@ -1,3 +1,3 @@
 ciscosparkapi==0.9.2
 requests==2.18.4
-urllib3==1.22
+urllib3==1.26.5
diff --git a/requirements.txt b/requirements.txt
index f9dfd02..380cdbb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,6 @@ ncclient==0.6.0
 netmiko==1.4.2
 pyang==1.7.4
 requests==2.20.0
-urllib3==1.24.2
+urllib3==1.26.5
 xmltodict==0.11.0
 ansible==2.5.4
diff --git a/verify/requirements.txt b/verify/requirements.txt
index 128affc..9e3b0af 100644
--- a/verify/requirements.txt
+++ b/verify/requirements.txt
@@ -2,4 +2,4 @@ ciscosparkapi==0.9.2
 ncclient==0.6.2
 netmiko==1.4.2
 requests==2.18.4
-urllib3==1.22
+urllib3==1.26.5