diff --git a/requirements.dev.txt b/requirements.dev.txt
index fb97ff2..c9fb9ba 100755
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -1,6 +1,7 @@
 pytest==9.0.3
 pytest-astropy==0.11.0
 pytest-cov==4.1.0
+moto==5.0.15
 ruff
 pandas
 stixdcpy