diff --git a/packages/squiggle-lang/package.json b/packages/squiggle-lang/package.json
index 7149470b..75531a28 100644
--- a/packages/squiggle-lang/package.json
+++ b/packages/squiggle-lang/package.json
@@ -54,7 +54,7 @@
     "chalk": "^5.0.1",
     "codecov": "^3.8.3",
     "fast-check": "^3.0.1",
-    "gentype": "^4.4.0",
+    "gentype": "^4.5.0",
     "jest": "^27.5.1",
     "moduleserve": "^0.9.1",
     "nyc": "^15.1.0",
diff --git a/yarn.lock b/yarn.lock
index f6d47a10..d187b6e3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9745,10 +9745,10 @@ gensync@^1.0.0-beta.1, gensync@^1.0.0-beta.2:
   resolved "https://registry.yarnpkg.com/gensync/-/gensync-1.0.0-beta.2.tgz#32a6ee76c3d7f52d46b2b1ae5d93fea8580a25e0"
   integrity sha512-3hN7NaskYvMDLQY55gnW3NQ+mesEAepTqlg+VEbj7zzqEMBVNhzcGYYeqFo/TlYz6eQiFcp1HcsCZO+nGgS8zg==
 
-gentype@^4.4.0:
-  version "4.4.0"
-  resolved "https://registry.yarnpkg.com/gentype/-/gentype-4.4.0.tgz#20a61776703ce79c638c4db34b8808e1896d3267"
-  integrity sha512-hLcKmMhD3DJzHffDqwYUkEZfdGSWJk6ehYmdzGHBs35mTJa2dhiAp31WqmhjkZIqKvD+A+gFEE+//QHG5dZfwg==
+gentype@^4.5.0:
+  version "4.5.0"
+  resolved "https://registry.yarnpkg.com/gentype/-/gentype-4.5.0.tgz#460152da93db783626fd25bbd38fb574d886f5f3"
+  integrity sha512-XqHBQPS6Qb2HSgNJAwYRXbQJ4LSvz+MgNvuWnj8bz0teSorsy2kDxA6F1eZx5ft8cnfKAls4uNEgd5uNcPbQDg==
 
 get-caller-file@^2.0.1, get-caller-file@^2.0.5:
   version "2.0.5"