diff --git a/pyproject.toml b/pyproject.toml
index eb847cf18..33da1f289 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,6 +22,7 @@ dependencies = [
     "jiter>=0.6.1,<0.15",
     "jinja2<4.0.0,>=3.1.4",
     "requests<3.0.0,>=2.32.3",
+    "regex>=2023.0.0",
 ]
 name = "instructor"
 version = "1.15.5"
diff --git a/uv.lock b/uv.lock
index c48c6cbcf..def6515fd 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1771,6 +1771,7 @@ dependencies = [
     { name = "openai" },
     { name = "pydantic" },
     { name = "pydantic-core" },
+    { name = "regex" },
     { name = "requests" },
     { name = "rich" },
     { name = "tenacity" },
@@ -1934,6 +1935,7 @@ requires-dist = [
     { name = "pytest-xdist", marker = "extra == 'dev'", specifier = ">=3.8.0" },
     { name = "python-dotenv", marker = "extra == 'dev'", specifier = ">=1.0.1" },
     { name = "redis", marker = "extra == 'test-docs'", specifier = ">=5.0.1,<8.0.0" },
+    { name = "regex", specifier = ">=2023.0.0" },
     { name = "requests", specifier = ">=2.32.3,<3.0.0" },
     { name = "rich", specifier = ">=13.7.0,<15.0.0" },
     { name = "sqlmodel", marker = "extra == 'sqlmodel'", specifier = ">=0.0.22,<1.0.0" },