diff --git a/stack.yaml b/stack.yaml
index edf29f6..c5a84b8 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -42,7 +42,7 @@ packages:
 # Dependency packages to be pulled from upstream that are not in the resolver
 # using the same syntax as the packages field.
 # (e.g., acme-missiles-0.3)
-extra-deps: [ "datetime-0.3.1", "stringprep-1.0.0", "th-printf-0.5.1" ]
+extra-deps: [ "datetime-0.3.1", "stringprep-1.0.0", "th-printf-0.5.1", "text-format-0.3.2" ]
 
 # Override default flag values for local packages and extra-deps
 # flags: {}