diff --git a/setup.cfg b/setup.cfg
index 747e60da..a7098cee 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -40,6 +40,7 @@ install_requires =
     mpmath>=1.2.0
     extension_helpers>=0.1
     pandas>=1.3
+    emcee>=3.1.4
     ne2001 @ git+https://github.com/FRBs/ne2001
     frb @ git+https://github.com/FRBs/FRB