diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -2,6 +2,12 @@
 
 ## Unreleased
 
+## 1.0.0.1 - 2026-10-13
+
+- Allow `tagged` 0.9.
+- The test suite no longer depends on `hs-opentelemetry-sdk`, so it builds
+  without `proto-lens`.
+
 ## 1.0.0.0 - 2026-05-29
 
 - Update to `hs-opentelemetry-api` 0.4.
diff --git a/hs-opentelemetry-instrumentation-tasty.cabal b/hs-opentelemetry-instrumentation-tasty.cabal
--- a/hs-opentelemetry-instrumentation-tasty.cabal
+++ b/hs-opentelemetry-instrumentation-tasty.cabal
@@ -1,6 +1,6 @@
 cabal-version: 2.0
 name:          hs-opentelemetry-instrumentation-tasty
-version:       1.0.0.0
+version:       1.0.0.1
 synopsis:      OpenTelemetry instrumentation for the Tasty test framework
 category:      OpenTelemetry, Testing
 
@@ -28,7 +28,7 @@
     base >=4.7 && <5
     , hs-opentelemetry-api ^>= 1.0
     , hs-opentelemetry-semantic-conventions >= 1.40 && < 2
-    , tagged ^>= 0.8
+    , tagged >= 0.8 && < 0.10
     , tasty ^>= 1.5
     , text
 
@@ -45,7 +45,6 @@
     , containers
     , hs-opentelemetry-api ^>= 1.0
     , hs-opentelemetry-instrumentation-tasty ^>= 1.0
-    , hs-opentelemetry-sdk ^>= 1.0
     , tasty
     , tasty-hunit
     , text
diff --git a/tests/OpenTelemetry/Instrumentation/Tasty/Tests.hs b/tests/OpenTelemetry/Instrumentation/Tasty/Tests.hs
--- a/tests/OpenTelemetry/Instrumentation/Tasty/Tests.hs
+++ b/tests/OpenTelemetry/Instrumentation/Tasty/Tests.hs
@@ -18,8 +18,7 @@
 import Data.Text (Text)
 import OpenTelemetry.Instrumentation.Tasty (instrumentTestTree)
 import OpenTelemetry.Processor.Span (FlushResult (FlushSuccess), ShutdownResult (ShutdownSuccess), SpanProcessor (..))
-import OpenTelemetry.Trace (ImmutableSpan (..), createTracerProvider, defaultSpanArguments, emptyTracerProviderOptions, getGlobalTracerProvider, inSpan, makeTracer, setGlobalTracerProvider, shutdownTracerProvider, tracerOptions)
-import OpenTelemetry.Trace.Core (hotName, spanHot, unsafeReadSpan)
+import OpenTelemetry.Trace.Core (ImmutableSpan (..), createTracerProvider, defaultSpanArguments, emptyTracerProviderOptions, getGlobalTracerProvider, hotName, inSpan, makeTracer, setGlobalTracerProvider, shutdownTracerProvider, spanHot, tracerOptions, unsafeReadSpan)
 import Test.Tasty (DependencyType (AllFinish), TestTree, sequentialTestGroup, testGroup, withResource)
 import Test.Tasty.HUnit (testCase, (@?=))
 import Test.Tasty.Ingredients (tryIngredients)