diff --git a/CHANGELOG.md b/CHANGELOG.md
index d2a092061..1a0f3c767 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## [v3.4.3](https://github.com/traefik/traefik/tree/v3.4.3) (2025-06-26)
+[All Commits](https://github.com/traefik/traefik/compare/v3.4.2...v3.4.3)
+
+**Bug fixes:**
+- **[http3]** Bump quic-go to v.0.49.0 ([#11848](https://github.com/traefik/traefik/pull/11848) by [joshua-siw](https://github.com/joshua-siw))
+
 ## [v3.4.2](https://github.com/traefik/traefik/tree/v3.4.2) (2025-06-26)
 [All Commits](https://github.com/traefik/traefik/compare/v3.4.1...v3.4.2)
 
diff --git a/go.mod b/go.mod
index e810e3120..e290e4b4c 100644
--- a/go.mod
+++ b/go.mod
@@ -55,7 +55,7 @@ require (
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // No tag on the repo.
 	github.com/prometheus/client_golang v1.19.1
 	github.com/prometheus/client_model v0.6.1
-	github.com/quic-go/quic-go v0.48.2
+	github.com/quic-go/quic-go v0.49.0
 	github.com/redis/go-redis/v9 v9.7.3
 	github.com/rs/zerolog v1.33.0
 	github.com/sirupsen/logrus v1.9.3
@@ -362,7 +362,7 @@ require (
 	go.opentelemetry.io/contrib/propagators/ot v1.28.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
-	go.uber.org/mock v0.4.0 // indirect
+	go.uber.org/mock v0.5.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/ratelimit v0.3.0 // indirect
 	go.uber.org/zap v1.27.0 // indirect
diff --git a/go.sum b/go.sum
index 908bc663a..ededf4f5e 100644
--- a/go.sum
+++ b/go.sum
@@ -1033,8 +1033,8 @@ github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoG
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
 github.com/quic-go/qpack v0.5.1 h1:giqksBPnT/HDtZ6VhtFKgoLOWmlyo9Ei6u9PqzIMbhI=
 github.com/quic-go/qpack v0.5.1/go.mod h1:+PC4XFrEskIVkcLzpEkbLqq1uCoxPhQuvK5rH1ZgaEg=
-github.com/quic-go/quic-go v0.48.2 h1:wsKXZPeGWpMpCGSWqOcqpW2wZYic/8T3aqiOID0/KWE=
-github.com/quic-go/quic-go v0.48.2/go.mod h1:yBgs3rWBOADpga7F+jJsb6Ybg1LSYiQvwWlLX+/6HMs=
+github.com/quic-go/quic-go v0.49.0 h1:w5iJHXwHxs1QxyBv1EHKuC50GX5to8mJAxvtnttJp94=
+github.com/quic-go/quic-go v0.49.0/go.mod h1:s2wDnmCdooUQBmQfpUSTCYBl1/D4FcqbULMMkASvR6s=
 github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a/go.mod h1:bCqnVzQkZxMG4s8nGwiZ5l3QUCyqpo9Y+/ZMZ9VjZe4=
 github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475/go.mod h1:bCqnVzQkZxMG4s8nGwiZ5l3QUCyqpo9Y+/ZMZ9VjZe4=
 github.com/redis/go-redis/v9 v9.7.3 h1:YpPyAayJV+XErNsatSElgRZZVCwXX9QzkKYNvO7x0wM=
@@ -1348,8 +1348,8 @@ go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0
 go.uber.org/goleak v1.1.11-0.20210813005559-691160354723/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
-go.uber.org/mock v0.4.0 h1:VcM4ZOtdbR4f6VXfiOpwpVJDL6lCReaZ6mw31wqh7KU=
-go.uber.org/mock v0.4.0/go.mod h1:a6FSlNadKUHUa9IP5Vyt1zh4fC7uAwxMutEAscFbkZc=
+go.uber.org/mock v0.5.0 h1:KAMbZvZPyBPWgD14IrIQ38QCyjwpvVVV6K/bHl1IwQU=
+go.uber.org/mock v0.5.0/go.mod h1:ge71pBPLYDk7QIi1LupWxdAykm7KIEFchiOqd6z7qMM=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
 go.uber.org/multierr v1.7.0/go.mod h1:7EAYxJLBy9rStEaz58O2t4Uvip6FSURkq8/ppBp95ak=
diff --git a/script/gcg/traefik-bugfix.toml b/script/gcg/traefik-bugfix.toml
index 0d046482c..75f553f47 100644
--- a/script/gcg/traefik-bugfix.toml
+++ b/script/gcg/traefik-bugfix.toml
@@ -4,11 +4,11 @@ RepositoryName = "traefik"
 OutputType = "file"
 FileName = "traefik_changelog.md"
 
-# example new bugfix v3.4.2
+# example new bugfix v3.4.3
 CurrentRef = "v3.4"
-PreviousRef = "v3.4.1"
+PreviousRef = "v3.4.2"
 BaseBranch = "v3.4"
-FutureCurrentRefName = "v3.4.2"
+FutureCurrentRefName = "v3.4.3"
 
 ThresholdPreviousRef = 10
 ThresholdCurrentRef = 10