diff --git a/pyproject.toml b/pyproject.toml
index 7ab1e69..a9ed5da 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ classifiers = [
 # Core runtime deps (mirrors requirements.txt)
 dependencies = [
 "numpy==2.3.3",
-"matplotlib==3.10.8",
+"matplotlib==3.10.9",
 "pyvisa==1.16.1",
 "pyserial==3.5",
 "LabJackPython==2.1.0",
diff --git a/requirements.txt b/requirements.txt
index b079485..8a12727 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 # Core runtime dependencies (pinned for reproducibility)
 # Update with: pip-compile (future) or manual bump after testing GUI & selftest
 numpy==2.3.3
-matplotlib==3.10.8
+matplotlib==3.10.9
 pyvisa==1.16.1
 pyserial==3.5
 LabJackPython==2.1.0