diff --git a/requirements-dev.in b/requirements-dev.in
index 84104679..2ffc5488 100644
--- a/requirements-dev.in
+++ b/requirements-dev.in
@@ -4,4 +4,5 @@ flake8==3.5.0 # flake8 3.6.0 is giving erroneous "W605 invalid escape sequence"
 pre-commit
 invoke
 twine
-nodeenv
\ No newline at end of file
+nodeenv
+pyyaml>=4.2b1
\ No newline at end of file
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 440f932b..fd491663 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -22,7 +22,7 @@ pre-commit==1.14.3
 pycodestyle==2.3.1        # via flake8
 pyflakes==1.6.0           # via flake8
 pygments==2.3.1           # via readme-renderer
-pyyaml==3.13              # via aspy.yaml, pre-commit
+pyyaml==4.2b4
 readme-renderer==24.0     # via twine
 requests-toolbelt==0.9.1  # via twine
 requests==2.21.0          # via requests-toolbelt, twine
diff --git a/requirements-docs.txt b/requirements-docs.txt
index 4ebea0a0..a6c05582 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -17,10 +17,11 @@ babel==2.6.0              # via sphinx
 bcrypt==3.1.6
 billiard==3.5.0.5
 blinker==1.4
-boto3==1.9.89
-botocore==1.12.89
+boto3==1.9.90
+botocore==1.12.90
 celery[redis]==4.2.1
 certifi==2018.11.29
+certsrv==2.1.1
 cffi==1.11.5
 chardet==3.0.4
 click==7.0
diff --git a/requirements-tests.in b/requirements-tests.in
index 02a2b0ae..dcd3d0c7 100644
--- a/requirements-tests.in
+++ b/requirements-tests.in
@@ -11,3 +11,4 @@ pytest
 pytest-flask
 pytest-mock
 requests-mock
+pyyaml>=4.2b1
\ No newline at end of file
diff --git a/requirements-tests.txt b/requirements-tests.txt
index 174e60ff..e4a34412 100644
--- a/requirements-tests.txt
+++ b/requirements-tests.txt
@@ -8,9 +8,9 @@ asn1crypto==0.24.0        # via cryptography
 atomicwrites==1.3.0       # via pytest
 attrs==18.2.0             # via pytest
 aws-xray-sdk==0.95        # via moto
-boto3==1.9.89             # via moto
+boto3==1.9.90             # via moto
 boto==2.49.0              # via moto
-botocore==1.12.89         # via boto3, moto, s3transfer
+botocore==1.12.90         # via boto3, moto, s3transfer
 certifi==2018.11.29       # via requests
 cffi==1.11.5              # via cryptography
 chardet==3.0.4            # via requests
@@ -50,7 +50,7 @@ pytest==4.2.0
 python-dateutil==2.8.0    # via botocore, faker, freezegun, moto
 python-jose==2.0.2        # via moto
 pytz==2018.9              # via moto
-pyyaml==3.13              # via pyaml
+pyyaml==4.2b4
 requests-mock==1.5.2
 requests==2.21.0          # via aws-xray-sdk, docker, moto, requests-mock, responses
 responses==0.10.5         # via moto
diff --git a/requirements.txt b/requirements.txt
index fd164c3d..f24d274e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,11 +15,11 @@ asyncpool==1.0
 bcrypt==3.1.6             # via flask-bcrypt, paramiko
 billiard==3.5.0.5         # via celery
 blinker==1.4              # via flask-mail, flask-principal, raven
-boto3==1.9.89
-botocore==1.12.89
+boto3==1.9.90
+botocore==1.12.90
 celery[redis]==4.2.1
 certifi==2018.11.29
-certsrv==2.1.0
+certsrv==2.1.1
 cffi==1.11.5              # via bcrypt, cryptography, pynacl
 chardet==3.0.4            # via requests
 click==7.0                # via flask