diff --git a/pyproject.toml b/pyproject.toml
index 4cd182d5..f0a132ed 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ description = "Planet SDK for Python"
 dependencies = [
     "click>=8.0",
     "geojson",
-    "httpx==0.27.2",
+    "httpx<0.28.0",
     "jsonschema",
     "pyjwt>=2.1",
     "tqdm>=4.56",