diff --git a/examples/agent/minimal-agent-example/requirements.txt b/examples/agent/minimal-agent-example/requirements.txt
index 96a3cb3e..63ab347c 100644
--- a/examples/agent/minimal-agent-example/requirements.txt
+++ b/examples/agent/minimal-agent-example/requirements.txt
@@ -9,7 +9,7 @@ aiosignal==1.3.2
 attrs==25.1.0
 certifi==2025.1.31
 frozenlist==1.5.0
-idna==3.10
+idna==3.15
 multidict==6.1.0
 propcache==0.2.1
 python-dateutil==2.9.0.post0
diff --git a/examples/agent/startup-simulator-3000/requirements.txt b/examples/agent/startup-simulator-3000/requirements.txt
index 1e42c2df..c8647416 100644
--- a/examples/agent/startup-simulator-3000/requirements.txt
+++ b/examples/agent/startup-simulator-3000/requirements.txt
@@ -10,7 +10,7 @@ galileo-core
 h11==0.16.0
 httpcore==1.0.9
 httpx==0.28.1
-idna==3.10
+idna==3.15
 jinja2==3.1.6
 jiter==0.10.0
 jsonpatch==1.33
diff --git a/examples/logging-samples/openai-responses/requirements.txt b/examples/logging-samples/openai-responses/requirements.txt
index d9e01594..c9a86ecd 100644
--- a/examples/logging-samples/openai-responses/requirements.txt
+++ b/examples/logging-samples/openai-responses/requirements.txt
@@ -28,7 +28,7 @@ httpx==0.28.1
     # via
     #   galileo-core
     #   openai
-idna==3.11
+idna==3.15
     # via
     #   anyio
     #   httpx
diff --git a/examples/rag/cli-rag-demo/requirements.txt b/examples/rag/cli-rag-demo/requirements.txt
index 7391207f..a65a43fa 100644
--- a/examples/rag/cli-rag-demo/requirements.txt
+++ b/examples/rag/cli-rag-demo/requirements.txt
@@ -9,7 +9,7 @@ aiosignal==1.3.2
 attrs==25.1.0
 certifi==2025.1.31
 frozenlist==1.5.0
-idna==3.10
+idna==3.15
 multidict==6.1.0
 pinecone==6.0.1
 pinecone-plugin-interface==0.0.7
diff --git a/examples/rag/elastic-chatbot-rag-app/requirements.txt b/examples/rag/elastic-chatbot-rag-app/requirements.txt
index 66b52223..4b4c937e 100644
--- a/examples/rag/elastic-chatbot-rag-app/requirements.txt
+++ b/examples/rag/elastic-chatbot-rag-app/requirements.txt
@@ -168,7 +168,7 @@ huggingface-hub==0.29.3
     # via
     #   tokenizers
     #   transformers
-idna==3.10
+idna==3.15
     # via
     #   anyio
     #   httpx
diff --git a/poetry.lock b/poetry.lock
index b28a30bb..a53e808d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1644,18 +1644,18 @@ license = ["ukkonen"]
 
 [[package]]
 name = "idna"
-version = "3.10"
+version = "3.18"
 description = "Internationalized Domain Names in Applications (IDNA)"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.9"
 groups = ["main", "dev", "test"]
 files = [
-    {file = "idna-3.10-py3-none-any.whl", hash = "sha256:946d195a0d259cbba61165e88e65941f16e9b36ea6ddb97f00452bae8b1287d3"},
-    {file = "idna-3.10.tar.gz", hash = "sha256:12f65c9b470abda6dc35cf8e63cc574b1c52b11df2c86030af0ac09b01b13ea9"},
+    {file = "idna-3.18-py3-none-any.whl", hash = "sha256:7f952cbe720b688055e3f87de14f5c3e5fdaa8bc3928985c4077ca689de849a2"},
+    {file = "idna-3.18.tar.gz", hash = "sha256:ffb385a7e039654cef1ab9ef32c6fafe283c0c0467bba1d9029738ce4a14a848"},
 ]
 
 [package.extras]
-all = ["flake8 (>=7.1.1)", "mypy (>=1.11.2)", "pytest (>=8.3.2)", "ruff (>=0.6.2)"]
+all = ["mypy (>=1.11.2)", "pytest (>=8.3.2)", "ruff (>=0.6.2)"]
 
 [[package]]
 name = "importlib-metadata"
@@ -6539,4 +6539,4 @@ openai = ["openai", "openai-agents", "packaging"]
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.11,<3.15"
-content-hash = "65168abf85cc660db3e65e00c42b3106661d127288596276748edc04979f28da"
+content-hash = "17558442036169d72254036e99d9d45a127aba90287be42b80b47d558e7d9326"
diff --git a/pyproject.toml b/pyproject.toml
index 27666a3e..f9664c24 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,6 +52,7 @@ opentelemetry-sdk = "^1.38.0"
 opentelemetry-api = "^1.38.0"
 opentelemetry-exporter-otlp-proto-http = "^1.38.0"
 filelock = ">=3.20.1"
+idna = ">=3.15,<4"
 
 [tool.poetry.group.test.dependencies]
 pytest = "^8.4.0"