diff --git a/requirements.txt b/requirements.txt
index adfc4a9..039d026 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ cycler==0.12.1
     # via matplotlib
 dspyce==0.0.6
     # via -r dspyce-demo-app-requirements.txt
-fonttools==4.54.1
+fonttools==4.55.3
     # via matplotlib
 idna==3.10
     # via requests