diff --git a/pyproject.toml b/pyproject.toml
index 14f95a1..63aca46 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ classifiers = [
 dependencies = [
     "httpx==0.28.1",
     "httpcore==1.0.9",
-    "idna>=3.18,<4",
+    "idna>=3.19,<4",
 ]
 
 [project.optional-dependencies]
diff --git a/requirements-ci.txt b/requirements-ci.txt
index 267acda..19c3736 100644
--- a/requirements-ci.txt
+++ b/requirements-ci.txt
@@ -20,8 +20,9 @@ httpcore==1.0.9 \
     --hash=sha256:2d400746a40668fc9dec9810239072b40b4484b640a8c38fd654a024c7a1bf55
 httpx==0.28.1 \
     --hash=sha256:d909fcccc110f8c7faf814ca82a9a4d816bc5a6dbfea25d6591d6985b8ba59ad
-idna==3.18 \
-    --hash=sha256:7f952cbe720b688055e3f87de14f5c3e5fdaa8bc3928985c4077ca689de849a2
+idna==3.19 \
+    --hash=sha256:5e0811a4383b21dc5838069f801c4fb62113b7447663d2530d2bd6e77b49bf15 \
+    --hash=sha256:815e7be7a7806d54abb586dc943addc79e8b2ee16915059658cbeff4b1b43bf4
 iniconfig==2.3.0 \
     --hash=sha256:f631c04d2c48c52b84d0d0549c99ff3859c98df65b3101406327ecc7d53fbf12
 packaging==26.3 \