diff --git a/src/azure-cli-core/setup.py b/src/azure-cli-core/setup.py
index 08cddb8b267..bb4e6dbb5e5 100644
--- a/src/azure-cli-core/setup.py
+++ b/src/azure-cli-core/setup.py
@@ -63,7 +63,7 @@
     'paramiko>=2.0.8,<3.0.0',
     'PyJWT',
     'pyopenssl>=17.1.0',  # https://github.com/pyca/pyopenssl/pull/612
-    'pyyaml',
+    'pyyaml~=5.2',
     'requests~=2.20',
     'six~=1.12',
     'wheel==0.30.0',
diff --git a/src/azure-cli/requirements.py3.Darwin.txt b/src/azure-cli/requirements.py3.Darwin.txt
index b5501a706df..bd73d625193 100644
--- a/src/azure-cli/requirements.py3.Darwin.txt
+++ b/src/azure-cli/requirements.py3.Darwin.txt
@@ -115,7 +115,7 @@ PyNaCl==1.3.0
 pyOpenSSL==19.0.0
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.3
 requests==2.22.0
 requests-oauthlib==1.2.0
 scp==0.13.2
diff --git a/src/azure-cli/requirements.py3.Linux.txt b/src/azure-cli/requirements.py3.Linux.txt
index b5501a706df..bd73d625193 100644
--- a/src/azure-cli/requirements.py3.Linux.txt
+++ b/src/azure-cli/requirements.py3.Linux.txt
@@ -115,7 +115,7 @@ PyNaCl==1.3.0
 pyOpenSSL==19.0.0
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.3
 requests==2.22.0
 requests-oauthlib==1.2.0
 scp==0.13.2
diff --git a/src/azure-cli/requirements.py3.windows.txt b/src/azure-cli/requirements.py3.windows.txt
index 7d4d9d4535f..7be898d7e42 100644
--- a/src/azure-cli/requirements.py3.windows.txt
+++ b/src/azure-cli/requirements.py3.windows.txt
@@ -115,7 +115,7 @@ pyreadline==2.1
 python-dateutil==2.8.0
 pytz==2019.1
 pywin32==225
-PyYAML==5.1.1
+PyYAML==5.3
 requests==2.22.0
 requests-oauthlib==1.2.0
 scp==0.13.2
diff --git a/src/azure-cli/setup.py b/src/azure-cli/setup.py
index f11a5f0abe0..d575092cf6c 100644
--- a/src/azure-cli/setup.py
+++ b/src/azure-cli/setup.py
@@ -136,7 +136,7 @@
     'pygments~=2.4',
     'pyOpenSSL>=17.1.0',
     'pytz==2019.1',
-    'pyyaml~=5.1',
+    'pyyaml~=5.2',
     'requests~=2.22',
     'scp~=0.13.2',
     'six~=1.12',
diff --git a/tools/setup.py b/tools/setup.py
index 950f7e6d980..bf17797f9fc 100644
--- a/tools/setup.py
+++ b/tools/setup.py
@@ -29,7 +29,7 @@
     'nose>=1.3.7',
     'readme_renderer>=17.2',
     'requests',
-    'pyyaml',
+    'pyyaml~=5.2',
     'knack',
     'six>=1.10.0',
     'tabulate>=0.7.7',