diff --git a/README.md b/README.md
index 4296f72..d604377 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Elasticsearch CLI
 
 ## Usage
 
-Command tree
+Command tree:
 
 ```console
  ccr
@@ -34,6 +34,7 @@ Command tree
  index
      alias
          create
+         delete
          list
      allocation
      close
@@ -53,6 +54,7 @@ Command tree
  snapshot
      list
      show
+ version
 ```
 
 Configure `esctl` with environment variables:
diff --git a/cmd/index_alias.go b/cmd/index_alias.go
index 22c7592..eb855f5 100644
--- a/cmd/index_alias.go
+++ b/cmd/index_alias.go
@@ -35,8 +35,8 @@ func IndexAlias(conf *cfg.Config) *cli.Command {
 		Commands: []*cli.Command{
 			IndexAliasCreate(conf),
 			IndexAliasList(conf),
+			IndexAliasDelete(conf),
 			//IndexAliasShow(conf),
-			//IndexAliasDelete(conf),
 			//IndexAliasAdd(conf), // see https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-indices-update-aliases
 		},
 	}
@@ -62,6 +62,26 @@ func IndexAliasCreate(conf *cfg.Config) *cli.Command {
 	}
 }
 
+func IndexAliasDelete(conf *cfg.Config) *cli.Command {
+	return &cli.Command{
+		Name:      "delete",
+		Aliases:   []string{"rm"},
+		Usage:     "delete an index alias",
+		UsageText: "delete <index> <alias>",
+
+		Action: func(ctx context.Context, cmd *cli.Command) error {
+			index := cmd.Args().Get(0)
+			alias := cmd.Args().Get(1)
+
+			if index == "" || alias == "" {
+				return errors.New("no index or alias specified")
+			}
+
+			return es.IndexAliasDelete(conf, index, alias)
+		},
+	}
+}
+
 func IndexAliasList(conf *cfg.Config) *cli.Command {
 	return &cli.Command{
 		Name:    "list",
diff --git a/pkg/cfg/config.go b/pkg/cfg/config.go
index cc240e3..4cc710d 100644
--- a/pkg/cfg/config.go
+++ b/pkg/cfg/config.go
@@ -31,10 +31,11 @@ import (
 )
 
 const (
-	Version string = `v0.0.12`
+	Version string = `v0.0.13`
 )
 
 var (
+	// initialized during build, see Makefile:buildlocal
 	APIVERSION, GOVERSION, BUILD, COMMIT, BRANCH string
 )
 
diff --git a/pkg/es/index_alias.go b/pkg/es/index_alias.go
index f59a7a7..06ec477 100644
--- a/pkg/es/index_alias.go
+++ b/pkg/es/index_alias.go
@@ -24,16 +24,15 @@ import (
 	"strings"
 
 	"codeberg.org/scip/esctl/pkg/cfg"
-    "codeberg.org/scip/esctl/pkg/printer"
+	"codeberg.org/scip/esctl/pkg/printer"
 )
 
 // FIXME: add filter support, see IndexCreate mapping
 func IndexAliasCreate(conf *cfg.Config, index, alias string) error {
-	create := conf.DefaultCluster.ES.Indices.PutAlias(index, alias).
+	res, err := conf.DefaultCluster.ES.Indices.PutAlias(index, alias).
 		Header("content-type", "application/json").
-		Header("accept", "application/json")
-
-	res, err := create.Do(context.Background())
+		Header("accept", "application/json").
+		Do(context.Background())
 
 	slog.Debug("create alias", "result", res)
 
@@ -52,12 +51,11 @@ func IndexAliasList(conf *cfg.Config) error {
 		filter = *regexp.MustCompile(conf.Filter[0])
 	}
 
-	create := conf.DefaultCluster.ES.Indices.GetAlias().
+	res, err := conf.DefaultCluster.ES.Indices.GetAlias().
 		Index("_all").
 		Header("content-type", "application/json").
-		Header("accept", "application/json")
-
-	res, err := create.Do(context.Background())
+		Header("accept", "application/json").
+		Do(context.Background())
 
 	if err != nil {
 		return fmt.Errorf("failed to list index aliases: %s", err)
@@ -100,3 +98,18 @@ func IndexAliasList(conf *cfg.Config) error {
 
 	return nil
 }
+
+func IndexAliasDelete(conf *cfg.Config, index, alias string) error {
+	res, err := conf.DefaultCluster.ES.Indices.DeleteAlias(index, alias).
+		Header("content-type", "application/json").
+		Header("accept", "application/json").
+		Do(context.Background())
+
+	slog.Debug("delete alias", "result", res)
+
+	if err != nil {
+		return fmt.Errorf("failed to delete index alias: %s", err)
+	}
+
+	return nil
+}