diff --git a/contrib/dev_reqs/requirements.txt b/contrib/dev_reqs/requirements.txt
index a783698ee4..0591b6d8a6 100644
--- a/contrib/dev_reqs/requirements.txt
+++ b/contrib/dev_reqs/requirements.txt
@@ -139,9 +139,9 @@ charset-normalizer==3.4.7 \
     # via
     #   -c src/backend/requirements.txt
     #   requests
-idna==3.13 \
-    --hash=sha256:585ea8fe5d69b9181ec1afba340451fba6ba764af97026f92a91d4eef164a242 \
-    --hash=sha256:892ea0cde124a99ce773decba204c5552b69c3c67ffd5f232eb7696135bc8bb3
+idna==3.15 \
+    --hash=sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8 \
+    --hash=sha256:ca962446ea538f7092a95e057da437618e886f4d349216d2b1e294abfdb65fdc
     # via
     #   -c src/backend/requirements.txt
     #   requests
diff --git a/docs/requirements.txt b/docs/requirements.txt
index df1b00c4a1..4248102d6e 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -227,9 +227,9 @@ httpx==0.28.1 \
     --hash=sha256:75e98c5f16b0f35b567856f597f06ff2270a374470a5c2392242528e3e3e42fc \
     --hash=sha256:d909fcccc110f8c7faf814ca82a9a4d816bc5a6dbfea25d6591d6985b8ba59ad
     # via neoteroi-mkdocs
-idna==3.13 \
-    --hash=sha256:585ea8fe5d69b9181ec1afba340451fba6ba764af97026f92a91d4eef164a242 \
-    --hash=sha256:892ea0cde124a99ce773decba204c5552b69c3c67ffd5f232eb7696135bc8bb3
+idna==3.15 \
+    --hash=sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8 \
+    --hash=sha256:ca962446ea538f7092a95e057da437618e886f4d349216d2b1e294abfdb65fdc
     # via
     #   -c src/backend/requirements.txt
     #   anyio
diff --git a/src/backend/requirements-3.14.txt b/src/backend/requirements-3.14.txt
index c331b69655..96528aea96 100644
--- a/src/backend/requirements-3.14.txt
+++ b/src/backend/requirements-3.14.txt
@@ -977,9 +977,9 @@ icalendar==7.0.3 \
     # via
     #   -c src/backend/requirements.txt
     #   django-ical
-idna==3.13 \
-    --hash=sha256:585ea8fe5d69b9181ec1afba340451fba6ba764af97026f92a91d4eef164a242 \
-    --hash=sha256:892ea0cde124a99ce773decba204c5552b69c3c67ffd5f232eb7696135bc8bb3
+idna==3.15 \
+    --hash=sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8 \
+    --hash=sha256:ca962446ea538f7092a95e057da437618e886f4d349216d2b1e294abfdb65fdc
     # via
     #   -c src/backend/requirements.txt
     #   django-anymail
diff --git a/src/backend/requirements-dev-3.14.txt b/src/backend/requirements-dev-3.14.txt
index 9c7503d9dc..a0f377ed8f 100644
--- a/src/backend/requirements-dev-3.14.txt
+++ b/src/backend/requirements-dev-3.14.txt
@@ -449,9 +449,9 @@ gprof2dot==2025.4.14 \
     --hash=sha256:0742e4c0b4409a5e8777e739388a11e1ed3750be86895655312ea7c20bd0090e \
     --hash=sha256:35743e2d2ca027bf48fa7cba37021aaf4a27beeae1ae8e05a50b55f1f921a6ce
     # via django-silk
-idna==3.13 \
-    --hash=sha256:585ea8fe5d69b9181ec1afba340451fba6ba764af97026f92a91d4eef164a242 \
-    --hash=sha256:892ea0cde124a99ce773decba204c5552b69c3c67ffd5f232eb7696135bc8bb3
+idna==3.15 \
+    --hash=sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8 \
+    --hash=sha256:ca962446ea538f7092a95e057da437618e886f4d349216d2b1e294abfdb65fdc
     # via
     #   -c src/backend/requirements-3.14.txt
     #   -c src/backend/requirements.txt
diff --git a/src/backend/requirements-dev.txt b/src/backend/requirements-dev.txt
index 9aa16fb90e..cdb18aede7 100644
--- a/src/backend/requirements-dev.txt
+++ b/src/backend/requirements-dev.txt
@@ -443,9 +443,9 @@ gprof2dot==2025.4.14 \
     --hash=sha256:0742e4c0b4409a5e8777e739388a11e1ed3750be86895655312ea7c20bd0090e \
     --hash=sha256:35743e2d2ca027bf48fa7cba37021aaf4a27beeae1ae8e05a50b55f1f921a6ce
     # via django-silk
-idna==3.13 \
-    --hash=sha256:585ea8fe5d69b9181ec1afba340451fba6ba764af97026f92a91d4eef164a242 \
-    --hash=sha256:892ea0cde124a99ce773decba204c5552b69c3c67ffd5f232eb7696135bc8bb3
+idna==3.15 \
+    --hash=sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8 \
+    --hash=sha256:ca962446ea538f7092a95e057da437618e886f4d349216d2b1e294abfdb65fdc
     # via
     #   -c src/backend/requirements.txt
     #   requests
diff --git a/src/backend/requirements.txt b/src/backend/requirements.txt
index d515cb039e..2d730180a4 100644
--- a/src/backend/requirements.txt
+++ b/src/backend/requirements.txt
@@ -868,9 +868,9 @@ icalendar==7.0.3 \
     --hash=sha256:8c9fea6d3a89671bba8b6938d8565b4d0ec465c6a2796ef0f92790dcb9e627cd \
     --hash=sha256:95027ece087ab87184d765f03761f25875821f74cdd18d3b57e9c868216d8fde
     # via django-ical
-idna==3.13 \
-    --hash=sha256:585ea8fe5d69b9181ec1afba340451fba6ba764af97026f92a91d4eef164a242 \
-    --hash=sha256:892ea0cde124a99ce773decba204c5552b69c3c67ffd5f232eb7696135bc8bb3
+idna==3.15 \
+    --hash=sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8 \
+    --hash=sha256:ca962446ea538f7092a95e057da437618e886f4d349216d2b1e294abfdb65fdc
     # via
     #   django-anymail
     #   requests