diff --git a/.travis.yml b/.travis.yml
index b54fd6c3b..4378f9c8f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,8 +27,9 @@ install:
     - sudo apt-get -y update
     # Install haveged, because Travis lacks entropy.
     - sudo apt-get -y install haveged python3 python3-venv python3-pip python3-dev python3-nose python3-redis python3-lxml python3-dateutil python3-msgpack libxml2-dev libzmq3-dev zlib1g-dev apache2 curl php-mysql php-dev php-cli libapache2-mod-php libfuzzy-dev php-mbstring libonig4 php-json php-xml php-opcache php-readline php-redis php-gnupg php-gd
-    - sudo pip3 install --upgrade pip setuptools requests pyzmq
+    - sudo pip3 install --upgrade pip setuptools requests
     - sudo pip3 install --upgrade -r requirements.txt
+    - sudo pip3 install --upgrade -r requirements-dev.txt
     - pip3 install --user poetry
     - phpenv rehash
     - sudo mkdir $HOME/.composer ; sudo chown $USER:www-data $HOME/.composer
diff --git a/requirements-dev.txt b/requirements-dev.txt
new file mode 100644
index 000000000..7a4a6991a
--- /dev/null
+++ b/requirements-dev.txt
@@ -0,0 +1,4 @@
+codecov
+coveralls
+nose
+requests-mock
diff --git a/requirements.txt b/requirements.txt
index bbae47f92..90a0bd762 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,19 +1,13 @@
 cybox>=2.1.0.21
-jsonschema
+jsonschema>=4.19.1
 lief>=0.13.1
 maec>=4.1.0.17
-misp-lib-stix2>=3.0.0
+misp-lib-stix2>=3.0.1.1
 mixbox>=1.0.5
-plyara>=2.0.2
+plyara>=2.1.1
 pydeep2>=0.5.1
 pymisp==2.4.176
-python-magic
-pyzmq
-redis
+python-magic>=0.4.27
+pyzmq>=25.1.1
+redis>=5.0.1
 stix>=1.2.0.11
-# test dependencies
-codecov
-coveralls
-nose
-pip
-requests-mock