diff --git a/pyproject.toml b/pyproject.toml
index 42468d43..759cd103 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,13 +26,13 @@ classifiers = [
     "Natural Language :: English",
 ]
 dependencies = [
-    "model2vec>=0.4.0",
-    "vicinity>=0.4.4",
+    "model2vec>=0.4.0,<0.10",
+    "vicinity>=0.4.4,<0.5",
     "numpy>=1.24.0",
     "pathspec>=0.12",
     "orjson",
     "questionary>=2.0,<3.0",
-    "semble-grammars>=0.1.2",
+    "semble-grammars>=0.1.2,<0.2",
     "tqdm>=4.60",
 ]
 
diff --git a/uv.lock b/uv.lock
index 6e5bd760..04ba3aba 100644
--- a/uv.lock
+++ b/uv.lock
@@ -3873,7 +3873,7 @@ requires-dist = [
     { name = "einops", marker = "extra == 'benchmark'", specifier = ">=0.8.2" },
     { name = "matplotlib", marker = "extra == 'benchmark'", specifier = ">=3.7" },
     { name = "mcp", marker = "extra == 'mcp'", specifier = ">=1.0,<2.0" },
-    { name = "model2vec", specifier = ">=0.4.0" },
+    { name = "model2vec", specifier = ">=0.4.0,<0.10" },
     { name = "mypy", marker = "extra == 'dev'", specifier = ">=1.0" },
     { name = "numpy", specifier = ">=1.24.0" },
     { name = "numpy", marker = "extra == 'benchmark'", specifier = ">=1.24.0" },
@@ -3886,11 +3886,11 @@ requires-dist = [
     { name = "pytest-cov", marker = "extra == 'dev'", specifier = ">=5.0" },
     { name = "questionary", specifier = ">=2.0,<3.0" },
     { name = "ruff", marker = "extra == 'dev'", specifier = ">=0.9.0" },
-    { name = "semble-grammars", specifier = ">=0.1.2" },
+    { name = "semble-grammars", specifier = ">=0.1.2,<0.2" },
     { name = "sentence-transformers", marker = "extra == 'benchmark'", specifier = ">=3.0" },
     { name = "tiktoken", marker = "extra == 'benchmark'", specifier = ">=0.7" },
     { name = "tqdm", specifier = ">=4.60" },
-    { name = "vicinity", specifier = ">=0.4.4" },
+    { name = "vicinity", specifier = ">=0.4.4,<0.5" },
 ]
 provides-extras = ["mcp", "benchmark", "dev"]