diff --git a/poetry.lock b/poetry.lock
index 5c26b560..72ea49d1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -300,13 +300,13 @@ socks = ["socksio (==1.*)"]
 
 [[package]]
 name = "httpx"
-version = "0.25.2"
+version = "0.27.0"
 description = "The next generation HTTP client."
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "httpx-0.25.2-py3-none-any.whl", hash = "sha256:a05d3d052d9b2dfce0e3896636467f8a5342fb2b902c819428e1ac65413ca118"},
-    {file = "httpx-0.25.2.tar.gz", hash = "sha256:8b8fcaa0c8ea7b05edd69a094e63a2094c4efcb48129fb757361bc423c0ad9e8"},
+    {file = "httpx-0.27.0-py3-none-any.whl", hash = "sha256:71d5465162c13681bff01ad59b2cc68dd838ea1f10e51574bac27103f00c91a5"},
+    {file = "httpx-0.27.0.tar.gz", hash = "sha256:a0cb88a46f32dc874e04ee956e4c2764aba2aa228f650b06788ba6bda2962ab5"},
 ]
 
 [package.dependencies]
@@ -912,4 +912,4 @@ oldcrypto = ["pycrypto"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.7"
-content-hash = "7338af6cfc99c3b5dc18aed40188f828128cf20a55615b82e847c8f7d3ea476f"
+content-hash = "afa63444ccd8197c15f29772eb3807f8d1e03c7aed7562c84d1087d16853bd24"
diff --git a/pyproject.toml b/pyproject.toml
index df69a742..bc879d9e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ methoddispatch = "^3.0.2"
 msgpack = "^1.0.0"
 httpx = [
   { version = "^0.24.1", python = "~3.7" },
-  { version = "^0.25.0", python = "^3.8" },
+  { version = ">= 0.25.0, < 1.0", python = "^3.8" },
 ]
 h2 = "^4.1.0" # required for httx package, HTTP2 communication
 websockets = ">= 10.0, < 13.0"