diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8245285b..3945fc59 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,7 +14,6 @@ jobs:
     name: Unit tests
     uses: apple/swift-nio/.github/workflows/unit_tests.yml@main
     with:
-      linux_5_10_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_6_0_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_6_1_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_6_2_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 284b0cda..cbe36c6a 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -18,7 +18,6 @@ jobs:
     name: Unit tests
     uses: apple/swift-nio/.github/workflows/unit_tests.yml@main
     with:
-      linux_5_10_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_6_0_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_6_1_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_6_2_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
diff --git a/IntegrationTests/tests_01_allocation_counters/Thresholds/5.10.json b/IntegrationTests/tests_01_allocation_counters/Thresholds/5.10.json
deleted file mode 100644
index c1dd69b0..00000000
--- a/IntegrationTests/tests_01_allocation_counters/Thresholds/5.10.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-    "1k_requests_inline_interleaved": 30150,
-    "1k_requests_inline_noninterleaved": 29100,
-    "1k_requests_interleaved": 36150,
-    "1k_requests_noninterleaved": 35100,
-    "client_server_h1_request_response": 280050,
-    "client_server_h1_request_response_inline": 265050,
-    "client_server_request_response": 249050,
-    "client_server_request_response_inline": 240050,
-    "client_server_request_response_many": 1194050,
-    "client_server_request_response_many_inline": 885050,
-    "create_client_stream_channel": 35050,
-    "create_client_stream_channel_inline": 35050,
-    "create_client_stream_channel_inline_no_promise_based_API": 35050,
-    "create_client_stream_channel_no_promise_based_API": 35050,
-    "get_100000_headers_canonical_form": 200050,
-    "get_100000_headers_canonical_form_trimming_whitespace": 200050,
-    "get_100000_headers_canonical_form_trimming_whitespace_from_long_string": 300050,
-    "get_100000_headers_canonical_form_trimming_whitespace_from_short_string": 200050,
-    "hpack_decoding": 5050,
-    "stream_teardown_100_concurrent": 253550,
-    "stream_teardown_100_concurrent_inline": 252150
-}
diff --git a/Package.swift b/Package.swift
index 03b4812a..d4f65baa 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.10
+// swift-tools-version:6.0
 //===----------------------------------------------------------------------===//
 //
 // This source file is part of the SwiftNIO open source project
@@ -19,10 +19,6 @@ let strictConcurrencyDevelopment = false
 
 let strictConcurrencySettings: [SwiftSetting] = {
     var initialSettings: [SwiftSetting] = []
-    initialSettings.append(contentsOf: [
-        .enableUpcomingFeature("StrictConcurrency"),
-        .enableUpcomingFeature("InferSendableFromCaptures"),
-    ])
 
     if strictConcurrencyDevelopment {
         // -warnings-as-errors here is a workaround so that IDE-based development can
diff --git a/README.md b/README.md
index 2c54710c..c9c771d7 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,8 @@ SwiftNIO HTTP/2     | Minimum Swift Version
 `1.27.0 ..< 1.29.0` | 5.6
 `1.29.0 ..< 1.31.0` | 5.7
 `1.31.0 ..< 1.37.0` | 5.8
-`1.37.0 ...`        | 5.9
+`1.37.0 ..< 1.39.0` | 5.9
+`1.39.0 ...` | 6.0
 
 ### `swift-nio-http2` 0.x