diff --git a/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/Makefile b/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/Makefile
index 949b94283bfb..06c47a63da16 100644
--- a/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/Makefile
+++ b/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/Makefile
@@ -1,5 +1,5 @@
 PORTNAME=	opentelemetry-instrumentation-active_model_serializers
-PORTVERSION=	0.20.3
+PORTVERSION=	0.21.0
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 
diff --git a/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/distinfo b/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/distinfo
index 9512073f1767..d589ee317bdf 100644
--- a/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/distinfo
+++ b/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1734888646
-SHA256 (rubygem/opentelemetry-instrumentation-active_model_serializers-0.20.3.gem) = 13334c0d9f37873ef33ae09d380c17ab16c81591a513d66ffbf5f746cb685b06
-SIZE (rubygem/opentelemetry-instrumentation-active_model_serializers-0.20.3.gem) = 11264
+TIMESTAMP = 1735228132
+SHA256 (rubygem/opentelemetry-instrumentation-active_model_serializers-0.21.0.gem) = f58a3d3aeae29be2f87640481b3e8afd9dca14d04cc6570562049e57fe55eb4b
+SIZE (rubygem/opentelemetry-instrumentation-active_model_serializers-0.21.0.gem) = 11264
diff --git a/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/files/patch-gemspec b/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/files/patch-gemspec
new file mode 100644
index 000000000000..5691fbd3e628
--- /dev/null
+++ b/devel/rubygem-opentelemetry-instrumentation-active_model_serializers/files/patch-gemspec
@@ -0,0 +1,11 @@
+--- opentelemetry-instrumentation-active_model_serializers.gemspec.orig	2024-12-28 10:21:40 UTC
++++ opentelemetry-instrumentation-active_model_serializers.gemspec
+@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
+   s.specification_version = 4
+ 
+   s.add_runtime_dependency(%q<opentelemetry-api>.freeze, ["~> 1.0".freeze])
+-  s.add_runtime_dependency(%q<opentelemetry-instrumentation-active_support>.freeze, [">= 0.7.0".freeze])
++  s.add_runtime_dependency(%q<opentelemetry-instrumentation-active_support>.freeze, [">= 0.6.0".freeze])
+   s.add_runtime_dependency(%q<opentelemetry-instrumentation-base>.freeze, ["~> 0.22.1".freeze])
+   s.add_development_dependency(%q<active_model_serializers>.freeze, [">= 0.10.0".freeze])
+   s.add_development_dependency(%q<appraisal>.freeze, ["~> 2.5".freeze])