diff --git a/pyproject.toml b/pyproject.toml
index 9700c242..4c8e1a86 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ dependencies = [
 
 [project.optional-dependencies]
 embeddings = [
-    "sentence-transformers>=3,<4",
+    "sentence-transformers>=3,<7",
     "numpy>=1.26,<2",
 ]
 # pdf text extraction for `vouch source add foo.pdf`. optional on purpose:
@@ -70,7 +70,7 @@ embeddings-fast = [
     "sqlite-vec>=0.1,<1",
 ]
 rerank = [
-    "sentence-transformers>=2.7,<4",
+    "sentence-transformers>=2.7,<7",
 ]
 
 [project.scripts]