diff --git a/requirements-lock.txt b/requirements-lock.txt
index edd8d1b..1db785b 100644
--- a/requirements-lock.txt
+++ b/requirements-lock.txt
@@ -6,7 +6,7 @@ numpy==2.4.6
 matplotlib==3.10.9
 scipy==1.17.1
 pytest==9.0.3
-reportlab==4.5.1
+reportlab==5.0.0
 
 # Neural LLM experiment dependencies (required for real_lm_experiment.py):
 # Install separately — platform-dependent. Use torch>=2.0.0; numpy 2.x is compatible.