diff --git a/poetry.lock b/poetry.lock
index 29095b9..1197f83 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -248,41 +248,42 @@ files = [
 
 [[package]]
 name = "httpcore"
-version = "0.17.0"
+version = "1.0.2"
 description = "A minimal low-level HTTP client."
 category = "main"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.8"
 files = [
-    {file = "httpcore-0.17.0-py3-none-any.whl", hash = "sha256:0fdfea45e94f0c9fd96eab9286077f9ff788dd186635ae61b312693e4d943599"},
-    {file = "httpcore-0.17.0.tar.gz", hash = "sha256:cc045a3241afbf60ce056202301b4d8b6af08845e3294055eb26b09913ef903c"},
+    {file = "httpcore-1.0.2-py3-none-any.whl", hash = "sha256:096cc05bca73b8e459a1fc3dcf585148f63e534eae4339559c9b8a8d6399acc7"},
+    {file = "httpcore-1.0.2.tar.gz", hash = "sha256:9fc092e4799b26174648e54b74ed5f683132a464e95643b226e00c2ed2fa6535"},
 ]
 
 [package.dependencies]
-anyio = ">=3.0,<5.0"
 certifi = "*"
 h11 = ">=0.13,<0.15"
-sniffio = ">=1.0.0,<2.0.0"
 
 [package.extras]
+asyncio = ["anyio (>=4.0,<5.0)"]
 http2 = ["h2 (>=3,<5)"]
 socks = ["socksio (>=1.0.0,<2.0.0)"]
+trio = ["trio (>=0.22.0,<0.23.0)"]
 
 [[package]]
 name = "httpx"
-version = "0.24.0"
+version = "0.26.0"
 description = "The next generation HTTP client."
 category = "main"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.8"
 files = [
-    {file = "httpx-0.24.0-py3-none-any.whl", hash = "sha256:447556b50c1921c351ea54b4fe79d91b724ed2b027462ab9a329465d147d5a4e"},
-    {file = "httpx-0.24.0.tar.gz", hash = "sha256:507d676fc3e26110d41df7d35ebd8b3b8585052450f4097401c9be59d928c63e"},
+    {file = "httpx-0.26.0-py3-none-any.whl", hash = "sha256:8915f5a3627c4d47b73e8202457cb28f1266982d1159bd5779d86a80c0eab1cd"},
+    {file = "httpx-0.26.0.tar.gz", hash = "sha256:451b55c30d5185ea6b23c2c793abf9bb237d2a7dfb901ced6ff69ad37ec1dfaf"},
 ]
 
 [package.dependencies]
+anyio = "*"
 certifi = "*"
-httpcore = ">=0.15.0,<0.18.0"
+httpcore = ">=1.0.0,<2.0.0"
 idna = "*"
 sniffio = "*"
 
@@ -860,4 +861,4 @@ test = ["covdefaults (>=2.3)", "coverage (>=7.2.3)", "coverage-enable-subprocess
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "eb6108df09b51c4f986da14f8b43db671bb11ceb9dddff6901aafd5ce32c37eb"
+content-hash = "5dd30ebd2ce28505b17ada318a50d7add1b842aaf59214ca19da8c1e665eb000"
diff --git a/pyproject.toml b/pyproject.toml
index 604a811..277ba3e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ python = "^3.11"
 fastapi = "==0.95.1"
 uvicorn = "==0.22.0"
 slack-bolt = "^1.16.2"
-httpx = "^0.24.0"
+httpx = "^0.26.0"
 path-py = "^12.5.0"
 ruff = "^0.0.265"
 
@@ -21,7 +21,7 @@ pre-commit = "==3.3.1"
 pytest-cov = "==4.0.0"
 pytest-mock = "==3.10.0"
 mypy = "==1.3.0"
-httpx = "==0.24.0"
+httpx = "==0.26.0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]