diff --git a/cmd/task/run/cmd.go b/cmd/task/run/cmd.go
index 1f9e27c09..bd66bc723 100644
--- a/cmd/task/run/cmd.go
+++ b/cmd/task/run/cmd.go
@@ -23,6 +23,7 @@ import (
 	"strings"
 
 	"github.com/datarobot/cli/internal/cli"
+	"github.com/datarobot/cli/internal/countflags"
 	"github.com/datarobot/cli/internal/log"
 	"github.com/datarobot/cli/internal/task"
 	"github.com/datarobot/cli/internal/telemetry"
@@ -183,7 +184,7 @@ Examples:
 
 	cmd.Flags().StringVarP(&opts.Dir, "dir", "d", ".", "📁 Specify project directory (default: current directory)")
 	cmd.Flags().BoolVarP(&opts.taskOpts.Parallel, "parallel", "p", false, "⚡ Run multiple tasks simultaneously for faster execution")
-	cmd.Flags().IntVarP(&opts.taskOpts.Concurrency, "concurrency", "C", 2, "🔢 Number of concurrent tasks to run in parallel")
+	cmd.Flags().VarP(countflags.PositiveInt(&opts.taskOpts.Concurrency, 2), "concurrency", "C", "🔢 Number of concurrent tasks to run in parallel")
 	cmd.Flags().BoolVarP(&opts.taskOpts.WatchTask, "watch", "w", false, "👀 Watch files and re-run task on changes")
 	cmd.Flags().BoolVarP(&opts.taskOpts.AnswerYes, "yes", "y", false, "🚀 Skip confirmation prompts (useful for automation)")
 	cmd.Flags().BoolVarP(&opts.taskOpts.ExitCode, "exit-code", "x", false, "🔄 Pass through the exact exit code from task")
diff --git a/cmd/task/run/cmd_test.go b/cmd/task/run/cmd_test.go
index c6646342f..e05fefb19 100644
--- a/cmd/task/run/cmd_test.go
+++ b/cmd/task/run/cmd_test.go
@@ -153,6 +153,17 @@ func TestCmdReturnsErrNotInTemplateWhenDatarobotMissing(t *testing.T) {
 	require.ErrorIs(t, err, cli.ErrSilent)
 }
 
+func TestCmdRejectsNonPositiveConcurrency(t *testing.T) {
+	// Rejected at parse time by countflags.PositiveInt, before any task
+	// runner is looked up: zero concurrency would run nothing.
+	cmd := Cmd()
+	cmd.SetArgs([]string{"--concurrency", "0", "start"})
+
+	err := cmd.Execute()
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "must be a positive integer")
+}
+
 // TestCmdStopsGeneratedTaskThatInvokesItself covers the recipe template's
 // `lint: [dr task run lint]` against a project with no committed root Taskfile.
 // Nothing sets DATAROBOT_CLI_TASK_RUN_FROM_ROOT on that path, so every