diff --git a/hledger-api/hledger-api.cabal b/hledger-api/hledger-api.cabal
index de2cc08f9..96ea00639 100644
--- a/hledger-api/hledger-api.cabal
+++ b/hledger-api/hledger-api.cabal
@@ -60,7 +60,7 @@ executable hledger-api
     , safe
     , servant-server >= 0.10
     , servant-swagger
-    , swagger2
+    , swagger2 >= 2.1 && < 2.1.5
     , text
     , transformers
     , wai
diff --git a/hledger-api/package.yaml b/hledger-api/package.yaml
index 651590cd3..49b629c89 100644
--- a/hledger-api/package.yaml
+++ b/hledger-api/package.yaml
@@ -46,7 +46,7 @@ dependencies:
 - safe
 - servant-server >= 0.10
 - servant-swagger
-- swagger2
+- swagger2 >= 2.1 && < 2.1.5
 - text
 - transformers
 - wai