diff --git a/CHANGELOG.md b/CHANGELOG.md
index e9a26a8c..580155bd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,11 +19,34 @@ to docs, or any other relevant information.
 
 ## [Unreleased]
 
+## [v1.6.0] - 2026-07-16
+
 ### Added
 
 - Exposed `Temporalio::Workflow::ContinueAsNewError#backoff_start_interval`, to allow the new workflow to start after a delay.
 - Added the experimental `Temporalio::Worker` `patch_activation_callback:` option, allowing workers to decide whether a first non-replay `Temporalio::Workflow.patched` call should activate a patch during rolling deployments.
 
+#### Experimental FIPS builds
+
+The native extension can now be built with `TEMPORALIO_FIPS=1` to use the FIPS-mode
+`aws-lc-rs` TLS backend for gRPC and OTLP metrics. This is opt-in, source-build only.
+FIPS builds use SHA-256 rather than MD5 for the default worker build ID and warn when
+the Ruby OpenSSL runtime is not itself in FIPS mode.
+
+#### Experimental RBS and RBI signatures are included in the gem
+
+Released gems now contain the SDK's maintained RBS signatures in `sig/` and Sorbet RBI
+signatures in `rbi/`, including generated types for Temporal API messages and services.
+These type signatures are subject to change in future releases as we move towards a stronger typing story.
+
+### Changed
+
+#### gRPC transport compression defaults to gzip
+
+Client connections now use gzip transport compression by default. Pass
+`grpc_compression: Temporalio::Client::Connection::GrpcCompressionOptions::None.new` to
+`Client.connect` or `Client::Connection.new` to opt out.
+
 ### Fixed
 
 #### `Workflow.suggest_continue_as_new_reasons` returns workflow enum values
@@ -32,10 +55,37 @@ Workflow activations containing continue-as-new suggestion reasons previously fa
 worker tried to call `to_i` on bridge enum symbols. Continue-as-new suggestion reasons are now 
 converted from bridge enum symbols to `Temporalio::SuggestContinueAsNewReason` integer enum values before being exposed to workflows.
 
-### Removed shutdown race in `replay_workflow`
+#### Deadlock errors from workflow futures fail the current workflow task
+
+A workflow deadlock raised inside `Temporalio::Workflow::Future` is no longer deferred until the
+future is awaited. The worker fails the current workflow task immediately, preventing commands
+created before the deadlock from being recorded as a successful partial command batch.
+
+#### Scheduler waits for the Protobuf object-cache mutex
+
+The workflow scheduler no longer yields while a workflow fiber is blocked on the
+`google-protobuf` object-cache mutex. This prevents a workflow task from completing with only part
+of a command batch when Protobuf serialization blocks.
+
+#### `replay_workflow` shutdown after nondeterminism
 
 Fixed a race in `replay_workflow` where if a NDE was hit, worker shutdown could panic if it happens before async activation completion completes.
 
+#### Core updates
+
+- Retried transport-originated gRPC `CANCELLED` errors, such as a connection closure or GOAWAY,
+  using the normal RPC retry policy while continuing not to retry application-initiated
+  cancellations.
+- Resource sampling interval for worker heartbeating now matches heartbeat interval rather than every 100ms
+- Activities with a heartbeat timeout shorter than their start-to-close timeout now still enforce
+  the start-to-close timeout while heartbeats succeed.
+- Local activity completion after workflow eviction no longer risks a Core panic or dispatching a
+  stale local activity.
+- Corrected the `worker_task_slots_used` gauge so it does not count a slot that is currently being
+  released.
+- OTLP metric export failures are now emitted through Core telemetry, making them visible through
+  the SDK logger.
+
 ## [v1.5.0] - 2026-06-11
 
 ### Breaking Changes
diff --git a/temporalio/Gemfile.lock b/temporalio/Gemfile.lock
index defe1b88..d6c2a63b 100644
--- a/temporalio/Gemfile.lock
+++ b/temporalio/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    temporalio (1.5.0)
+    temporalio (1.6.0)
       google-protobuf (>= 3.25.0)
       logger
 
@@ -284,7 +284,7 @@ CHECKSUMS
   steep (1.10.0) sha256=1b295b55f9aaff1b8d3ee42453ee55bc2a1078fda0268f288edb2dc014f4d7d1
   stringio (3.2.0) sha256=c37cb2e58b4ffbd33fe5cd948c05934af997b36e0b6ca6fdf43afa234cf222e1
   strscan (3.1.8) sha256=aae2db611a225559f21ffbb71765c9a4e60fd262534a9ea84f4f11c7f32f679e
-  temporalio (1.5.0)
+  temporalio (1.6.0)
   terminal-table (4.0.0) sha256=f504793203f8251b2ea7c7068333053f0beeea26093ec9962e62ea79f94301d2
   timeout (0.6.1) sha256=78f57368a7e7bbadec56971f78a3f5ecbcfb59b7fcbb0a3ed6ddc08a5094accb
   traces (0.18.2) sha256=80f1649cb4daace1d7174b81f3b3b7427af0b93047759ba349960cb8f315e214
diff --git a/temporalio/lib/temporalio/version.rb b/temporalio/lib/temporalio/version.rb
index 21b41148..fb5201bf 100644
--- a/temporalio/lib/temporalio/version.rb
+++ b/temporalio/lib/temporalio/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Temporalio
-  VERSION = '1.5.0'
+  VERSION = '1.6.0'
 end