diff --git a/internal/config/unit.go b/internal/config/unit.go
index 0c3d75c..f46f30f 100644
--- a/internal/config/unit.go
+++ b/internal/config/unit.go
@@ -87,10 +87,17 @@ func (u *Unit) Template(ctx context.Context, name, squadron, unit, namespace str
 		Args(u.PostRendererArgs()...).
 		Args("--values", "-").
 		Args(helmArgs...)
+
 	if strings.HasPrefix(u.Chart.Repository, "file://") {
 		cmd.Args(path.Clean(strings.TrimPrefix(u.Chart.Repository, "file://")))
 	} else {
-		cmd.Args(u.Chart.Name, "--repo", u.Chart.Repository, "--version", u.Chart.Version)
+		cmd.Args(u.Chart.Name)
+		if u.Chart.Repository != "" {
+			cmd.Args("--repo", u.Chart.Repository)
+		}
+		if u.Chart.Version != "" {
+			cmd.Args("--version", u.Chart.Version)
+		}
 	}
 	if out, err := cmd.Run(ctx); err != nil {
 		return nil, errors.Wrap(err, out)
diff --git a/squadron.go b/squadron.go
index 7ea1342..88b9d08 100644
--- a/squadron.go
+++ b/squadron.go
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"os"
 	"os/exec"
+	"path"
 	"slices"
 	"strings"
 	"sync"
@@ -364,10 +365,17 @@ func (sq *Squadron) Diff(ctx context.Context, helmArgs []string, parallel int) e
 					"--dry-run",
 				)
 				cmd.Stdin = bytes.NewReader(valueBytes)
-				if strings.Contains(v.Chart.Repository, "file://") {
-					cmd.Args = append(cmd.Args, "/"+strings.TrimPrefix(v.Chart.Repository, "file://"))
+
+				if strings.HasPrefix(v.Chart.Repository, "file://") {
+					cmd.Args = append(cmd.Args, path.Clean(strings.TrimPrefix(v.Chart.Repository, "file://")))
 				} else {
-					cmd.Args = append(cmd.Args, v.Chart.Name, "--repo", v.Chart.Repository, "--version", v.Chart.Version)
+					cmd.Args = append(cmd.Args, v.Chart.Name)
+					if v.Chart.Repository != "" {
+						cmd.Args = append(cmd.Args, "--repo", v.Chart.Repository)
+					}
+					if v.Chart.Version != "" {
+						cmd.Args = append(cmd.Args, "--version", v.Chart.Version)
+					}
 				}
 				cmd.Args = append(cmd.Args, helmArgs...)
 				out, err := cmd.CombinedOutput()
@@ -551,8 +559,8 @@ func (sq *Squadron) Up(ctx context.Context, helmArgs []string, username, version
 					Args("--values", "-").
 					Args(helmArgs...)
 
-				if strings.Contains(v.Chart.Repository, "file://") {
-					cmd.Args(strings.TrimPrefix(v.Chart.Repository, "file://"))
+				if strings.HasPrefix(v.Chart.Repository, "file://") {
+					cmd.Args(path.Clean(strings.TrimPrefix(v.Chart.Repository, "file://")))
 				} else {
 					cmd.Args(v.Chart.Name)
 					if v.Chart.Repository != "" {