diff --git a/conda-reqs/circt.json b/conda-reqs/circt.json
index 020fe373a..77c1389d5 100644
--- a/conda-reqs/circt.json
+++ b/conda-reqs/circt.json
@@ -1,3 +1,3 @@
 {
-  "version": "firtool-1.75.0"
+  "version": "firtool-1.91.0"
 }