diff --git a/.appveyor.yml b/.appveyor.yml
index dfa5ea87a..6acec1bf7 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -103,7 +103,7 @@ for:
       # target Python version and architecture
       - ps: echo("Install pip requirements:")
       - cmd: "python -m pip install -r requirements.txt"
-      - cmd: "python -m pip install PyInstaller"
+      - cmd: "python -m pip install PyInstaller==6.2.0"
     before_build:
         # directory that will contain the built files
       - ps: $env:PYFA_DIST_DIR = "c:\projects\$env:APPVEYOR_PROJECT_SLUG\dist"
diff --git a/requirements.txt b/requirements.txt
index 20c3abb46..2ab81cad8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,15 +1,15 @@
-wxPython
-logbook
-numpy
-matplotlib
-python-dateutil
-requests
+wxPython==4.2.1
+logbook==1.7.0.post0
+numpy==1.26.2
+matplotlib==3.8.2
+python-dateutil==2.8.2
+requests==2.31.0
 sqlalchemy==1.4.50
-cryptography
-markdown2
-packaging
-roman
-beautifulsoup4
-pyyaml
-python-jose
-requests-cache
+cryptography==41.0.7
+markdown2==2.4.11
+packaging==23.2
+roman==4.1
+beautifulsoup4==4.12.2
+pyyaml==6.0.1
+python-jose==3.3.0
+requests-cache==1.1.1
diff --git a/scripts/osx-setup.sh b/scripts/osx-setup.sh
index d225af1e4..ced394767 100644
--- a/scripts/osx-setup.sh
+++ b/scripts/osx-setup.sh
@@ -6,4 +6,4 @@ python3 -m pip install --upgrade pip
 echo "Installing app requirements..."
 python3 -m pip install -r requirements.txt
 echo "Installing packaging tools..."
-python3 -m pip install PyInstaller
+python3 -m pip install PyInstaller==6.2.0