diff --git a/go.mod b/go.mod
index 73c2d153ed8..27556b64a3d 100644
--- a/go.mod
+++ b/go.mod
@@ -86,7 +86,7 @@ require (
 	github.com/googleapis/gax-go/v2 v2.14.2 // @grafana/grafana-backend-group
 	github.com/gorilla/mux v1.8.1 // @grafana/grafana-backend-group
 	github.com/gorilla/websocket v1.5.4-0.20250319132907-e064f32e3674 // @grafana/grafana-app-platform-squad
-	github.com/grafana/alerting v0.0.0-20250903205312-24567882c5d1 // @grafana/alerting-backend
+	github.com/grafana/alerting v0.0.0-20250911172908-2b26ef8f17eb // @grafana/alerting-backend
 	github.com/grafana/authlib v0.0.0-20250710201142-9542f2f28d43 // @grafana/identity-access-team
 	github.com/grafana/authlib/types v0.0.0-20250710201142-9542f2f28d43 // @grafana/identity-access-team
 	github.com/grafana/dataplane/examples v0.0.1 // @grafana/observability-metrics
@@ -653,9 +653,8 @@ require (
 // Use fork of crewjam/saml with fixes for some issues until changes get merged into upstream
 replace github.com/crewjam/saml => github.com/grafana/saml v0.4.15-0.20240917091248-ae3bbdad8a56
 
-// Use our fork of the upstream alertmanagers.
-// This is required in order to get notification delivery errors from the receivers API.
-replace github.com/prometheus/alertmanager => github.com/grafana/prometheus-alertmanager v0.25.1-0.20250821192752-903ba9e90238
+// Use our fork of the upstream Alertmanager.
+replace github.com/prometheus/alertmanager => github.com/grafana/prometheus-alertmanager v0.25.1-0.20250911094103-5456b6e45604
 
 exclude github.com/mattn/go-sqlite3 v2.0.3+incompatible
 
diff --git a/go.sum b/go.sum
index 806c79cc1a3..883b100df76 100644
--- a/go.sum
+++ b/go.sum
@@ -1590,8 +1590,8 @@ github.com/gorilla/sessions v1.2.1 h1:DHd3rPN5lE3Ts3D8rKkQ8x/0kqfeNmBAaiSi+o7Fsg
 github.com/gorilla/sessions v1.2.1/go.mod h1:dk2InVEVJ0sfLlnXv9EAgkf6ecYs/i80K/zI+bUmuGM=
 github.com/gorilla/websocket v1.5.4-0.20250319132907-e064f32e3674 h1:JeSE6pjso5THxAzdVpqr6/geYxZytqFMBCOtn/ujyeo=
 github.com/gorilla/websocket v1.5.4-0.20250319132907-e064f32e3674/go.mod h1:r4w70xmWCQKmi1ONH4KIaBptdivuRPyosB9RmPlGEwA=
-github.com/grafana/alerting v0.0.0-20250903205312-24567882c5d1 h1:1Xjk9zr9P4jeRsdHlWkQPiByd16YEEeTVqkwn8i6iMQ=
-github.com/grafana/alerting v0.0.0-20250903205312-24567882c5d1/go.mod h1:EfKE30jNw2b4whbJjtgea3JXUfUSVadmVSL/IAGgJeQ=
+github.com/grafana/alerting v0.0.0-20250911172908-2b26ef8f17eb h1:g/gbEJoncYghiojMM6OwWJi1P+SC/mnjBG+E422p48o=
+github.com/grafana/alerting v0.0.0-20250911172908-2b26ef8f17eb/go.mod h1:XWqj/rlsy4OV/E9XNNyFn+a7U4GNsSugPb2rDBj9+58=
 github.com/grafana/authlib v0.0.0-20250710201142-9542f2f28d43 h1:vVPT0i5Y1vI6qzecYStV2yk7cHKrC3Pc7AgvwT5KydQ=
 github.com/grafana/authlib v0.0.0-20250710201142-9542f2f28d43/go.mod h1:1fWkOiL+m32NBgRHZtlZGz2ji868tPZACYbqP3nBRJI=
 github.com/grafana/authlib/types v0.0.0-20250710201142-9542f2f28d43 h1:NlkGMnVi/oUn6Cr90QbJYpQJ4FnjyAIG9Ex5GtTZIzw=
@@ -1640,8 +1640,8 @@ github.com/grafana/nanogit v0.0.0-20250723104447-68f58f5ecec0 h1:cS0SlJGIlZbmDLc
 github.com/grafana/nanogit v0.0.0-20250723104447-68f58f5ecec0/go.mod h1:ToqLjIdvV3AZQa3K6e5m9hy/nsGaUByc2dWQlctB9iA=
 github.com/grafana/otel-profiling-go v0.5.1 h1:stVPKAFZSa7eGiqbYuG25VcqYksR6iWvF3YH66t4qL8=
 github.com/grafana/otel-profiling-go v0.5.1/go.mod h1:ftN/t5A/4gQI19/8MoWurBEtC6gFw8Dns1sJZ9W4Tls=
-github.com/grafana/prometheus-alertmanager v0.25.1-0.20250821192752-903ba9e90238 h1:0UYzSzpVFKCc4OhVB8dZai3lO0ANg7IIdSZhMiBhdOg=
-github.com/grafana/prometheus-alertmanager v0.25.1-0.20250821192752-903ba9e90238/go.mod h1:O/QP1BCm0HHIzbKvgMzqb5sSyH88rzkFk84F4TfJjBU=
+github.com/grafana/prometheus-alertmanager v0.25.1-0.20250911094103-5456b6e45604 h1:aXfUhVN/Ewfpbko2CCtL65cIiGgwStOo4lWH2b6gw2U=
+github.com/grafana/prometheus-alertmanager v0.25.1-0.20250911094103-5456b6e45604/go.mod h1:O/QP1BCm0HHIzbKvgMzqb5sSyH88rzkFk84F4TfJjBU=
 github.com/grafana/pyroscope-go/godeltaprof v0.1.8 h1:iwOtYXeeVSAeYefJNaxDytgjKtUuKQbJqgAIjlnicKg=
 github.com/grafana/pyroscope-go/godeltaprof v0.1.8/go.mod h1:2+l7K7twW49Ct4wFluZD3tZ6e0SjanjcUUBPVD/UuGU=
 github.com/grafana/pyroscope/api v1.2.1-0.20250415190842-3ff7247547ae h1:35W3Wjp9KWnSoV/DuymmyIj5aHE0CYlDQ5m2KeXUPAc=
diff --git a/go.work b/go.work
index 70c91d135c6..eb1e142b168 100644
--- a/go.work
+++ b/go.work
@@ -30,6 +30,6 @@ use (
 	./pkg/semconv
 )
 
-replace github.com/prometheus/alertmanager => github.com/grafana/prometheus-alertmanager v0.25.1-0.20250620093340-be61a673dee6
+replace github.com/prometheus/alertmanager => github.com/grafana/prometheus-alertmanager v0.25.1-0.20250911094103-5456b6e45604
 
 replace github.com/crewjam/saml => github.com/grafana/saml v0.4.15-0.20240917091248-ae3bbdad8a56