diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 9b38024b..9b4c44f0 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -11,7 +11,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.25.5"
+          go-version: "1.26.1"
       - name: Check out shell-operator code
         uses: actions/checkout@v4
       - name: Restore Go modules
diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
index 25a854e1..5e8adaad 100644
--- a/.github/workflows/lint.yaml
+++ b/.github/workflows/lint.yaml
@@ -12,7 +12,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.25.5"
+          go-version: "1.26.1"
       - name: Check out shell-operator code
         uses: actions/checkout@v4
       - name: Restore Go modules
@@ -31,7 +31,7 @@ jobs:
           echo -n "Go modules unpacked size is: " && du -sh $HOME/go/pkg/mod
       - name: Run golangci-lint
         run: |
-          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b . v2.8.0
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b . v2.11.4
           ./golangci-lint run --build-tags integration,test
   codespell:
     name: Run codespell
diff --git a/.github/workflows/tests-labeled.yaml b/.github/workflows/tests-labeled.yaml
index d5c778af..d79b5d60 100644
--- a/.github/workflows/tests-labeled.yaml
+++ b/.github/workflows/tests-labeled.yaml
@@ -65,7 +65,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.25.5"
+          go-version: "1.26.1"
       - name: Check out shell-operator code
         uses: actions/checkout@v4
       - name: Restore Go modules
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 4d28733d..39a6b4c9 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -12,7 +12,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.25.5"
+          go-version: "1.26.1"
       - name: Check out shell-operator code
         uses: actions/checkout@v4
       - name: Restore Go modules
diff --git a/Makefile b/Makefile
index 13407678..4d0020e0 100644
--- a/Makefile
+++ b/Makefile
@@ -34,8 +34,8 @@ YQ = $(LOCALBIN)/yq
 ## TODO: remap in yaml file (version.yaml or smthng)
 ## Tool Versions
 # GO_BUILDER_VERSION must be without 'v' prefix
-GO_BUILDER_VERSION = 1.25.5
-GOLANGCI_LINT_VERSION = v2.8.0
+GO_BUILDER_VERSION = 1.26.1
+GOLANGCI_LINT_VERSION = v2.11.4
 YQ_VERSION ?= v4.50.1
 
 
diff --git a/go.mod b/go.mod
index 1c4f246d..3395ad70 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/flant/shell-operator
 
-go 1.24.0
+go 1.25.8
 
 require (
 	github.com/deckhouse/deckhouse/pkg/log v0.2.0
@@ -37,7 +37,7 @@ require (
 replace github.com/go-openapi/validate => github.com/flant/go-openapi-validate v0.19.12-flant.0
 
 require (
-	github.com/deckhouse/module-sdk v0.10.2
+	github.com/deckhouse/module-sdk v0.10.4
 	github.com/gojuno/minimock/v3 v3.4.7
 	github.com/itchyny/gojq v0.12.17
 	github.com/muesli/termenv v0.16.0
diff --git a/go.sum b/go.sum
index d024ab7a..807c7526 100644
--- a/go.sum
+++ b/go.sum
@@ -37,8 +37,8 @@ github.com/deckhouse/deckhouse/pkg/log v0.2.0 h1:6tmZQLwNb1o/hP1gzJQBjcwfA/bubbg
 github.com/deckhouse/deckhouse/pkg/log v0.2.0/go.mod h1:pbAxTSDcPmwyl3wwKDcEB3qdxHnRxqTV+J0K+sha8bw=
 github.com/deckhouse/deckhouse/pkg/metrics-storage v0.3.0 h1:xZvbKuexrSQGEw6CB4n3UC7XbOb9QNLbm8UhcGZ2R1I=
 github.com/deckhouse/deckhouse/pkg/metrics-storage v0.3.0/go.mod h1:Rz++SzCLkFW03WGgftnn91TimGU2shiKb5S/YuxcBuE=
-github.com/deckhouse/module-sdk v0.10.2 h1:jYxFTgjdaZ9NKWKbFP95RvD55WJvhwjPAeSMFKhZb0o=
-github.com/deckhouse/module-sdk v0.10.2/go.mod h1:Z1jfmd0fICoYww0daMijWAU+OZTxeJUXfMciKKuYAYA=
+github.com/deckhouse/module-sdk v0.10.4 h1:1C61nXevgQiUnmv5Is+XP9Octu05XWKgjFi6gmL7miM=
+github.com/deckhouse/module-sdk v0.10.4/go.mod h1:wpEKjpMUHZ4D5JGPfHChKGzBcOVyZnUN4sP0yTEaHdU=
 github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/emicklei/go-restful/v3 v3.11.0 h1:rAQeMHw1c7zTmncogyy8VvRZwtkmkZ4FxERmMY4rD+g=
 github.com/emicklei/go-restful/v3 v3.11.0/go.mod h1:6n3XBCmQQb25CM2LCACGz8ukIrRry+4bhvbpWn3mrbc=
diff --git a/pkg/task/dump/dump.go b/pkg/task/dump/dump.go
index 222bd6a5..b0d2a5c4 100644
--- a/pkg/task/dump/dump.go
+++ b/pkg/task/dump/dump.go
@@ -50,11 +50,11 @@ func TaskMainQueue(tqs *queue.TaskQueueSet, format string) interface{} {
 
 	if format == "text" {
 		var buf strings.Builder
-		buf.WriteString(fmt.Sprintf("Queue '%s': length %d, status: '%s'\n", dq.Name, dq.TasksCount, dq.Status))
+		fmt.Fprintf(&buf, "Queue '%s': length %d, status: '%s'\n", dq.Name, dq.TasksCount, dq.Status)
 		buf.WriteString("\n")
 
 		for _, ts := range dq.Tasks {
-			buf.WriteString(fmt.Sprintf("%2d. ", ts.Index))
+			fmt.Fprintf(&buf, "%2d. ", ts.Index)
 			buf.WriteString(ts.Description)
 			buf.WriteString("\n")
 		}
@@ -264,11 +264,11 @@ func (dtq dumpTaskQueues) asText(showEmpty bool) string {
 			buf.WriteString("\n")
 		}
 
-		buf.WriteString(fmt.Sprintf("Queue '%s': length %d, status: '%s'\n", taskQueue.Name, taskQueue.TasksCount, taskQueue.Status))
+		fmt.Fprintf(&buf, "Queue '%s': length %d, status: '%s'\n", taskQueue.Name, taskQueue.TasksCount, taskQueue.Status)
 		buf.WriteString("\n")
 
 		for _, tk := range taskQueue.Tasks {
-			buf.WriteString(fmt.Sprintf("%2d. ", tk.Index))
+			fmt.Fprintf(&buf, "%2d. ", tk.Index)
 			buf.WriteString(tk.Description)
 			buf.WriteString("\n")
 		}
@@ -276,9 +276,9 @@ func (dtq dumpTaskQueues) asText(showEmpty bool) string {
 
 	// Empty queues. Do not report single empty main queue.
 	if showEmpty {
-		buf.WriteString(fmt.Sprintf("\nEmpty queues (%d):\n", len(dtq.Empty)))
+		fmt.Fprintf(&buf, "\nEmpty queues (%d):\n", len(dtq.Empty))
 		for _, taskQueue := range dtq.Empty {
-			buf.WriteString(fmt.Sprintf("- %s\n", taskQueue.Name))
+			fmt.Fprintf(&buf, "- %s\n", taskQueue.Name)
 		}
 	}
 
@@ -300,22 +300,22 @@ func (dtq dumpTaskQueues) asText(showEmpty bool) string {
 		buf.WriteString("Summary:\n")
 		if dtq.MainQueue != nil {
 			otherQueuesCount-- // minus main queue
-			buf.WriteString(fmt.Sprintf("- '%s' queue: %s.\n",
+			fmt.Fprintf(&buf, "- '%s' queue: %s.\n",
 				dtq.MainQueue.Name,
-				pluralize(len(dtq.MainQueue.Tasks), "empty", "task", "tasks")))
+				pluralize(len(dtq.MainQueue.Tasks), "empty", "task", "tasks"))
 		}
 
 		if otherQueuesCount > 0 {
-			buf.WriteString(fmt.Sprintf("- %s (%d active, %d empty): %s.\n",
+			fmt.Fprintf(&buf, "- %s (%d active, %d empty): %s.\n",
 				pluralize(otherQueuesCount, "", "other queue", "other queues"),
 				dtq.Summary.otherQueuesActiveCount, dtq.Summary.otherQueuesEmptyCount,
-				pluralize(dtq.Summary.otherQueuesTasksCount, "", "task", "tasks")))
+				pluralize(dtq.Summary.otherQueuesTasksCount, "", "task", "tasks"))
 		}
 		if dtq.Summary.totalTasksCount == 0 {
 			buf.WriteString("- no tasks to handle.\n")
 		} else {
-			buf.WriteString(fmt.Sprintf("- total %s to handle.\n",
-				pluralize(dtq.Summary.totalTasksCount, "", "task", "tasks")))
+			fmt.Fprintf(&buf, "- total %s to handle.\n",
+				pluralize(dtq.Summary.totalTasksCount, "", "task", "tasks"))
 		}
 	}
 
diff --git a/pkg/task/queue/task_queue.go b/pkg/task/queue/task_queue.go
index b5144a87..b83739ee 100644
--- a/pkg/task/queue/task_queue.go
+++ b/pkg/task/queue/task_queue.go
@@ -1053,7 +1053,7 @@ func (q *TaskQueue) String() string {
 	qLen := q.Length()
 
 	q.IterateSnapshot(func(t task.Task) {
-		buf.WriteString(fmt.Sprintf("[%s,id=%10.10s]", t.GetDescription(), t.GetId()))
+		fmt.Fprintf(&buf, "[%s,id=%10.10s]", t.GetDescription(), t.GetId())
 		index++
 		if index == qLen {
 			return