diff --git a/go.mod b/go.mod
index 0899e1e01..1cfcf1a29 100644
--- a/go.mod
+++ b/go.mod
@@ -20,11 +20,11 @@ require (
 	go.etcd.io/etcd v0.5.0-alpha.5.0.20230414071934-94593e63d45c
 	go.opentelemetry.io/contrib/instrumentation/host v0.45.0
 	go.opentelemetry.io/contrib/instrumentation/runtime v0.45.0
-	go.opentelemetry.io/otel v1.20.0
+	go.opentelemetry.io/otel v1.21.0
 	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v0.43.0
 	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v0.43.0
-	go.opentelemetry.io/otel/metric v1.20.0
-	go.opentelemetry.io/otel/sdk v1.20.0
+	go.opentelemetry.io/otel/metric v1.21.0
+	go.opentelemetry.io/otel/sdk v1.21.0
 	go.opentelemetry.io/otel/sdk/metric v1.20.0
 	go.uber.org/automaxprocs v1.5.3
 	go.uber.org/goleak v1.3.0
@@ -104,7 +104,7 @@ require (
 	github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 // indirect
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
 	github.com/yusufpapurcu/wmi v1.2.3 // indirect
-	go.opentelemetry.io/otel/trace v1.20.0 // indirect
+	go.opentelemetry.io/otel/trace v1.21.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.0.0 // indirect
 	golang.org/x/mod v0.14.0 // indirect
 	golang.org/x/net v0.18.0 // indirect
diff --git a/go.sum b/go.sum
index a7a52910d..382d88a33 100644
--- a/go.sum
+++ b/go.sum
@@ -478,20 +478,20 @@ go.opentelemetry.io/contrib/instrumentation/host v0.45.0 h1:1uzNKJDqZ6y6F5J6aKWg
 go.opentelemetry.io/contrib/instrumentation/host v0.45.0/go.mod h1:vlqPvzDsmB4+jlERxBRXsdLCD6Q0LoBzxHqNXp3qvG4=
 go.opentelemetry.io/contrib/instrumentation/runtime v0.45.0 h1:2JydY5UiDpqvj2p7sO9bgHuhTy4hgTZ0ymehdq/Ob0Q=
 go.opentelemetry.io/contrib/instrumentation/runtime v0.45.0/go.mod h1:ch3a5QxOqVWxas4CzjCFFOOQe+7HgAXC/N1oVxS9DK4=
-go.opentelemetry.io/otel v1.20.0 h1:vsb/ggIY+hUjD/zCAQHpzTmndPqv/ml2ArbsbfBYTAc=
-go.opentelemetry.io/otel v1.20.0/go.mod h1:oUIGj3D77RwJdM6PPZImDpSZGDvkD9fhesHny69JFrs=
+go.opentelemetry.io/otel v1.21.0 h1:hzLeKBZEL7Okw2mGzZ0cc4k/A7Fta0uoPgaJCr8fsFc=
+go.opentelemetry.io/otel v1.21.0/go.mod h1:QZzNPQPm1zLX4gZK4cMi+71eaorMSGT3A4znnUvNNEo=
 go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v0.43.0 h1:tFUz2BE6ucxU9PuPCwzbfDeQjMznIySJ4/73a3FSPUs=
 go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v0.43.0/go.mod h1:hbzqqcIxyywu6UQ5J1wb4ntla8nCwCfNBZnMo2Dgh48=
 go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v0.43.0 h1:vcSjcjn/BTeM6abI5CDymZdtd1m24quD1Mx4VE3N3fM=
 go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v0.43.0/go.mod h1:HblEnlZQNsVuuDpszdKTWcrHBI09OjBn2pWSzBx1goM=
-go.opentelemetry.io/otel/metric v1.20.0 h1:ZlrO8Hu9+GAhnepmRGhSU7/VkpjrNowxRN9GyKR4wzA=
-go.opentelemetry.io/otel/metric v1.20.0/go.mod h1:90DRw3nfK4D7Sm/75yQ00gTJxtkBxX+wu6YaNymbpVM=
-go.opentelemetry.io/otel/sdk v1.20.0 h1:5Jf6imeFZlZtKv9Qbo6qt2ZkmWtdWx/wzcCbNUlAWGM=
-go.opentelemetry.io/otel/sdk v1.20.0/go.mod h1:rmkSx1cZCm/tn16iWDn1GQbLtsW/LvsdEEFzCSRM6V0=
+go.opentelemetry.io/otel/metric v1.21.0 h1:tlYWfeo+Bocx5kLEloTjbcDwBuELRrIFxwdQ36PlJu4=
+go.opentelemetry.io/otel/metric v1.21.0/go.mod h1:o1p3CA8nNHW8j5yuQLdc1eeqEaPfzug24uvsyIEJRWM=
+go.opentelemetry.io/otel/sdk v1.21.0 h1:FTt8qirL1EysG6sTQRZ5TokkU8d0ugCj8htOgThZXQ8=
+go.opentelemetry.io/otel/sdk v1.21.0/go.mod h1:Nna6Yv7PWTdgJHVRD9hIYywQBRx7pbox6nwBnZIxl/E=
 go.opentelemetry.io/otel/sdk/metric v1.20.0 h1:5eD40l/H2CqdKmbSV7iht2KMK0faAIL2pVYzJOWobGk=
 go.opentelemetry.io/otel/sdk/metric v1.20.0/go.mod h1:AGvpC+YF/jblITiafMTYgvRBUiwi9hZf0EYE2E5XlS8=
-go.opentelemetry.io/otel/trace v1.20.0 h1:+yxVAPZPbQhbC3OfAkeIVTky6iTFpcr4SiY9om7mXSQ=
-go.opentelemetry.io/otel/trace v1.20.0/go.mod h1:HJSK7F/hA5RlzpZ0zKDCHCDHm556LCDtKaAo6JmBFUU=
+go.opentelemetry.io/otel/trace v1.21.0 h1:WD9i5gzvoUPuXIXH24ZNBudiarZDKuekPqi/E8fpfLc=
+go.opentelemetry.io/otel/trace v1.21.0/go.mod h1:LGbsEB0f9LGjN+OZaQQ26sohbOmiMR+BaslueVtS/qQ=
 go.opentelemetry.io/proto/otlp v1.0.0 h1:T0TX0tmXU8a3CbNXzEKGeU5mIVOdf0oykP+u2lIVU/I=
 go.opentelemetry.io/proto/otlp v1.0.0/go.mod h1:Sy6pihPLfYHkr3NkUbEhGHFhINUSI/v80hjKIs5JXpM=
 go.uber.org/automaxprocs v1.5.3 h1:kWazyxZUrS3Gs4qUpbwo5kEIMGe/DAvi5Z4tl2NW4j8=
diff --git a/vendor/go.opentelemetry.io/otel/.gitignore b/vendor/go.opentelemetry.io/otel/.gitignore
index 924805565..895c7664b 100644
--- a/vendor/go.opentelemetry.io/otel/.gitignore
+++ b/vendor/go.opentelemetry.io/otel/.gitignore
@@ -14,13 +14,9 @@ go.work.sum
 gen/
 
 /example/dice/dice
-/example/fib/fib
-/example/fib/traces.txt
-/example/jaeger/jaeger
 /example/namedtracer/namedtracer
 /example/otel-collector/otel-collector
 /example/opencensus/opencensus
 /example/passthrough/passthrough
 /example/prometheus/prometheus
-/example/view/view
 /example/zipkin/zipkin
diff --git a/vendor/go.opentelemetry.io/otel/CHANGELOG.md b/vendor/go.opentelemetry.io/otel/CHANGELOG.md
index c4e7ad475..24874f856 100644
--- a/vendor/go.opentelemetry.io/otel/CHANGELOG.md
+++ b/vendor/go.opentelemetry.io/otel/CHANGELOG.md
@@ -8,6 +8,20 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 
+## [1.21.0/0.44.0] 2023-11-16
+
+### Removed
+
+- Remove the deprecated `go.opentelemetry.io/otel/bridge/opencensus.NewTracer`. (#4706)
+- Remove the deprecated `go.opentelemetry.io/otel/exporters/otlp/otlpmetric` module. (#4707)
+- Remove the deprecated `go.opentelemetry.io/otel/example/view` module. (#4708)
+- Remove the deprecated `go.opentelemetry.io/otel/example/fib` module. (#4723)
+
+### Fixed
+
+- Do not parse non-protobuf responses in `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp`. (#4719)
+- Do not parse non-protobuf responses in `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp`. (#4719)
+
 ## [1.20.0/0.43.0] 2023-11-10
 
 This release brings a breaking change for custom trace API implementations. Some interfaces (`TracerProvider`, `Tracer`, `Span`) now embed the `go.opentelemetry.io/otel/trace/embedded` types. Implementors need to update their implementations based on what they want the default behavior to be. See the "API Implementations" section of the [trace API] package documentation for more information about how to accomplish this.
@@ -2721,7 +2735,8 @@ It contains api and sdk for trace and meter.
 - CircleCI build CI manifest files.
 - CODEOWNERS file to track owners of this project.
 
-[Unreleased]: https://github.com/open-telemetry/opentelemetry-go/compare/v1.20.0...HEAD
+[Unreleased]: https://github.com/open-telemetry/opentelemetry-go/compare/v1.21.0...HEAD
+[1.21.0/0.44.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v1.21.0
 [1.20.0/0.43.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v1.20.0
 [1.19.0/0.42.0/0.0.7]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v1.19.0
 [1.19.0-rc.1/0.42.0-rc.1]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v1.19.0-rc.1
diff --git a/vendor/go.opentelemetry.io/otel/CONTRIBUTING.md b/vendor/go.opentelemetry.io/otel/CONTRIBUTING.md
index a00dbca7b..850606ae6 100644
--- a/vendor/go.opentelemetry.io/otel/CONTRIBUTING.md
+++ b/vendor/go.opentelemetry.io/otel/CONTRIBUTING.md
@@ -90,6 +90,10 @@ git push <YOUR_FORK> <YOUR_BRANCH_NAME>
 Open a pull request against the main `opentelemetry-go` repo. Be sure to add the pull
 request ID to the entry you added to `CHANGELOG.md`.
 
+Avoid rebasing and force-pushing to your branch to facilitate reviewing the pull request.
+Rewriting Git history makes it difficult to keep track of iterations during code review.
+All pull requests are squashed to a single commit upon merge to `main`.
+
 ### How to Receive Comments
 
 * If the PR is not ready for review, please put `[WIP]` in the title,
diff --git a/vendor/go.opentelemetry.io/otel/sdk/version.go b/vendor/go.opentelemetry.io/otel/sdk/version.go
index 7048c788e..422d4c964 100644
--- a/vendor/go.opentelemetry.io/otel/sdk/version.go
+++ b/vendor/go.opentelemetry.io/otel/sdk/version.go
@@ -16,5 +16,5 @@ package sdk // import "go.opentelemetry.io/otel/sdk"
 
 // Version is the current release version of the OpenTelemetry SDK in use.
 func Version() string {
-	return "1.20.0"
+	return "1.21.0"
 }
diff --git a/vendor/go.opentelemetry.io/otel/version.go b/vendor/go.opentelemetry.io/otel/version.go
index 5a92f1d4b..e2f743585 100644
--- a/vendor/go.opentelemetry.io/otel/version.go
+++ b/vendor/go.opentelemetry.io/otel/version.go
@@ -16,5 +16,5 @@ package otel // import "go.opentelemetry.io/otel"
 
 // Version is the current release version of OpenTelemetry in use.
 func Version() string {
-	return "1.20.0"
+	return "1.21.0"
 }
diff --git a/vendor/go.opentelemetry.io/otel/versions.yaml b/vendor/go.opentelemetry.io/otel/versions.yaml
index 82366e799..3c153c9d6 100644
--- a/vendor/go.opentelemetry.io/otel/versions.yaml
+++ b/vendor/go.opentelemetry.io/otel/versions.yaml
@@ -14,13 +14,12 @@
 
 module-sets:
   stable-v1:
-    version: v1.20.0
+    version: v1.21.0
     modules:
       - go.opentelemetry.io/otel
       - go.opentelemetry.io/otel/bridge/opentracing
       - go.opentelemetry.io/otel/bridge/opentracing/test
       - go.opentelemetry.io/otel/example/dice
-      - go.opentelemetry.io/otel/example/fib
       - go.opentelemetry.io/otel/example/namedtracer
       - go.opentelemetry.io/otel/example/otel-collector
       - go.opentelemetry.io/otel/example/passthrough
@@ -35,14 +34,12 @@ module-sets:
       - go.opentelemetry.io/otel/sdk/metric
       - go.opentelemetry.io/otel/trace
   experimental-metrics:
-    version: v0.43.0
+    version: v0.44.0
     modules:
       - go.opentelemetry.io/otel/bridge/opencensus
       - go.opentelemetry.io/otel/bridge/opencensus/test
       - go.opentelemetry.io/otel/example/opencensus
       - go.opentelemetry.io/otel/example/prometheus
-      - go.opentelemetry.io/otel/example/view
-      - go.opentelemetry.io/otel/exporters/otlp/otlpmetric
       - go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc
       - go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp
       - go.opentelemetry.io/otel/exporters/prometheus
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 621346480..7510a6f93 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -354,7 +354,7 @@ go.opentelemetry.io/contrib/instrumentation/host
 # go.opentelemetry.io/contrib/instrumentation/runtime v0.45.0
 ## explicit; go 1.19
 go.opentelemetry.io/contrib/instrumentation/runtime
-# go.opentelemetry.io/otel v1.20.0
+# go.opentelemetry.io/otel v1.21.0
 ## explicit; go 1.20
 go.opentelemetry.io/otel
 go.opentelemetry.io/otel/attribute
@@ -377,12 +377,12 @@ go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/trans
 # go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v0.43.0
 ## explicit; go 1.20
 go.opentelemetry.io/otel/exporters/stdout/stdoutmetric
-# go.opentelemetry.io/otel/metric v1.20.0
+# go.opentelemetry.io/otel/metric v1.21.0
 ## explicit; go 1.20
 go.opentelemetry.io/otel/metric
 go.opentelemetry.io/otel/metric/embedded
 go.opentelemetry.io/otel/metric/noop
-# go.opentelemetry.io/otel/sdk v1.20.0
+# go.opentelemetry.io/otel/sdk v1.21.0
 ## explicit; go 1.20
 go.opentelemetry.io/otel/sdk
 go.opentelemetry.io/otel/sdk/instrumentation
@@ -393,7 +393,7 @@ go.opentelemetry.io/otel/sdk/metric
 go.opentelemetry.io/otel/sdk/metric/internal
 go.opentelemetry.io/otel/sdk/metric/internal/aggregate
 go.opentelemetry.io/otel/sdk/metric/metricdata
-# go.opentelemetry.io/otel/trace v1.20.0
+# go.opentelemetry.io/otel/trace v1.21.0
 ## explicit; go 1.20
 go.opentelemetry.io/otel/trace
 go.opentelemetry.io/otel/trace/embedded