diff --git a/sympy_bot/submodules.txt b/sympy_bot/submodules.txt
index 44843da..b7c6917 100644
--- a/sympy_bot/submodules.txt
+++ b/sympy_bot/submodules.txt
@@ -17,6 +17,7 @@ core
 crypto
 diffgeom
 discrete
+equation
 external
 functions
 geometry