diff --git a/assembler_tools/hec-assembler-tools/requirements.txt b/assembler_tools/hec-assembler-tools/requirements.txt
index 7f7ad59..67c2a99 100644
--- a/assembler_tools/hec-assembler-tools/requirements.txt
+++ b/assembler_tools/hec-assembler-tools/requirements.txt
@@ -1,6 +1,6 @@
 contourpy==1.0.7
 cycler==0.11.0
-fonttools==4.43.0
+fonttools==4.61.0
 importlib-resources==5.12.0
 kiwisolver==1.4.4
 matplotlib==3.7.1