diff --git a/pyproject.toml b/pyproject.toml
index a51e823..27d4465 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ classifiers = [
 dependencies = [
   "pandas==2.2.3",
   "simpy==4.1.1",
-  "PyYAML==6.0.2",
+  "PyYAML==6.0.3",
   "jsonschema==4.23.0"
 ]
 
diff --git a/requirements.txt b/requirements.txt
index 64080bd..d7e797e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,5 +3,5 @@ pandas==2.2.3
 
 # simulator
 simpy==4.1.1
-PyYAML==6.0.2
+PyYAML==6.0.3
 jsonschema==4.23.0