diff --git a/contrib/automation/hgautomation/linux.py b/contrib/automation/hgautomation/linux.py
--- a/contrib/automation/hgautomation/linux.py
+++ b/contrib/automation/hgautomation/linux.py
@@ -75,7 +75,7 @@
 sudo -H -u hg -g hg /home/hg/.cargo/bin/rustup install 1.31.1 1.46.0
 sudo -H -u hg -g hg /home/hg/.cargo/bin/rustup component add clippy
 
-sudo -H -u hg -g hg /home/hg/.cargo/bin/cargo install --version 0.9.0 pyoxidizer
+sudo -H -u hg -g hg /home/hg/.cargo/bin/cargo install --version 0.10.3 pyoxidizer
 '''
 
 
diff --git a/contrib/install-windows-dependencies.ps1 b/contrib/install-windows-dependencies.ps1
--- a/contrib/install-windows-dependencies.ps1
+++ b/contrib/install-windows-dependencies.ps1
@@ -125,7 +125,7 @@
     Invoke-Process "${prefix}\cargo\bin\rustup.exe" "component add clippy"
 
     # Install PyOxidizer for packaging.
-    Invoke-Process "${prefix}\cargo\bin\cargo.exe" "install --version 0.9.0 pyoxidizer"
+    Invoke-Process "${prefix}\cargo\bin\cargo.exe" "install --version 0.10.3 pyoxidizer"
 }
 
 function Install-Dependencies($prefix) {