diff --git a/tools/extractors/pyproject.toml b/tools/extractors/pyproject.toml
index f1dfe42..d0b467c 100644
--- a/tools/extractors/pyproject.toml
+++ b/tools/extractors/pyproject.toml
@@ -38,7 +38,7 @@ docs = [
 # extra rather than the base dependency set. The default string-similarity
 # pass (`cora concepts suggest`) needs none of this.
 concepts-ml = [
-  "sentence-transformers>=3,<6",
+  "sentence-transformers>=3,<7",
   "numpy>=1.26,<3",
 ]