diff --git a/pkg/cmd/gist/delete/delete.go b/pkg/cmd/gist/delete/delete.go
index 54f745030..674c33ad6 100644
--- a/pkg/cmd/gist/delete/delete.go
+++ b/pkg/cmd/gist/delete/delete.go
@@ -29,7 +29,7 @@ func NewCmdDelete(f *cmdutil.Factory, runF func(*DeleteOptions) error) *cobra.Co
 	cmd := &cobra.Command{
 		Use:   "delete {<id> | <url>}",
 		Short: "Delete a gist",
-		Args:  cmdutil.MinimumArgs(1, "cannot delete: gist argument required"),
+		Args:  cmdutil.ExactArgs(1, "cannot delete: gist argument required"),
 		RunE: func(c *cobra.Command, args []string) error {
 			opts.Selector = args[0]
 			if runF != nil {
diff --git a/pkg/cmd/gist/edit/edit.go b/pkg/cmd/gist/edit/edit.go
index 3bea3757b..5d8146f8b 100644
--- a/pkg/cmd/gist/edit/edit.go
+++ b/pkg/cmd/gist/edit/edit.go
@@ -50,8 +50,8 @@ func NewCmdEdit(f *cmdutil.Factory, runF func(*EditOptions) error) *cobra.Comman
 
 	cmd := &cobra.Command{
 		Use:   "edit {<id> | <url>}",
-		Short: "Edit or add files in a gist",
-		Args:  cmdutil.MinimumArgs(1, "cannot edit: gist argument required"),
+		Short: "Edit one of your gists",
+		Args:  cmdutil.ExactArgs(1, "cannot edit: gist argument required"),
 		RunE: func(c *cobra.Command, args []string) error {
 			opts.Selector = args[0]
 
diff --git a/pkg/cmd/gist/view/view.go b/pkg/cmd/gist/view/view.go
index 70bb0a238..e1e9408cf 100644
--- a/pkg/cmd/gist/view/view.go
+++ b/pkg/cmd/gist/view/view.go
@@ -35,7 +35,7 @@ func NewCmdView(f *cmdutil.Factory, runF func(*ViewOptions) error) *cobra.Comman
 	cmd := &cobra.Command{
 		Use:   "view {<id> | <url>}",
 		Short: "View a gist",
-		Args:  cmdutil.MinimumArgs(1, "cannot view: gist argument required"),
+		Args:  cmdutil.ExactArgs(1, "cannot view: gist argument required"),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			opts.Selector = args[0]
 
diff --git a/pkg/cmd/pr/checkout/checkout.go b/pkg/cmd/pr/checkout/checkout.go
index d2cd84304..f7f73bb28 100644
--- a/pkg/cmd/pr/checkout/checkout.go
+++ b/pkg/cmd/pr/checkout/checkout.go
@@ -46,7 +46,7 @@ func NewCmdCheckout(f *cmdutil.Factory, runF func(*CheckoutOptions) error) *cobr
 	cmd := &cobra.Command{
 		Use:   "checkout {<number> | <url> | <branch>}",
 		Short: "Check out a pull request in git",
-		Args:  cmdutil.MinimumArgs(1, "argument required"),
+		Args:  cmdutil.ExactArgs(1, "argument required"),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			// support `-R, --repo` override
 			opts.BaseRepo = f.BaseRepo
diff --git a/pkg/cmd/pr/edit/edit.go b/pkg/cmd/pr/edit/edit.go
index 6c1592b4c..3fc1c8f10 100644
--- a/pkg/cmd/pr/edit/edit.go
+++ b/pkg/cmd/pr/edit/edit.go
@@ -70,6 +70,9 @@ func NewCmdEdit(f *cmdutil.Factory, runF func(*EditOptions) error) *cobra.Comman
 			if flags.Changed("body") {
 				opts.Editable.Body.Edited = true
 			}
+			if flags.Changed("base") {
+				opts.Editable.Base.Edited = true
+			}
 			if flags.Changed("add-reviewer") || flags.Changed("remove-reviewer") {
 				opts.Editable.Reviewers.Edited = true
 			}
@@ -104,6 +107,7 @@ func NewCmdEdit(f *cmdutil.Factory, runF func(*EditOptions) error) *cobra.Comman
 
 	cmd.Flags().StringVarP(&opts.Editable.Title.Value, "title", "t", "", "Set the new title.")
 	cmd.Flags().StringVarP(&opts.Editable.Body.Value, "body", "b", "", "Set the new body.")
+	cmd.Flags().StringVarP(&opts.Editable.Base.Value, "base", "B", "", "Change the base `branch` for this pull request")
 	cmd.Flags().StringSliceVar(&opts.Editable.Reviewers.Add, "add-reviewer", nil, "Add reviewers by their `login`.")
 	cmd.Flags().StringSliceVar(&opts.Editable.Reviewers.Remove, "remove-reviewer", nil, "Remove reviewers by their `login`.")
 	cmd.Flags().StringSliceVar(&opts.Editable.Assignees.Add, "add-assignee", nil, "Add assigned users by their `login`. Use \"@me\" to assign yourself.")
@@ -133,6 +137,7 @@ func editRun(opts *EditOptions) error {
 	editable.Reviewers.Allowed = true
 	editable.Title.Default = pr.Title
 	editable.Body.Default = pr.Body
+	editable.Base.Default = pr.BaseRefName
 	editable.Reviewers.Default = pr.ReviewRequests.Logins()
 	editable.Assignees.Default = pr.Assignees.Logins()
 	editable.Labels.Default = pr.Labels.Names()
@@ -203,6 +208,9 @@ func updatePullRequest(client *api.Client, repo ghrepo.Interface, id string, edi
 		return err
 	}
 	params.MilestoneID = ghId(milestoneId)
+	if editable.Base.Edited {
+		params.BaseRefName = ghString(&editable.Base.Value)
+	}
 	err = api.UpdatePullRequest(client, repo, params)
 	if err != nil {
 		return err
diff --git a/pkg/cmd/pr/edit/edit_test.go b/pkg/cmd/pr/edit/edit_test.go
index 35d8278dc..da328ba5b 100644
--- a/pkg/cmd/pr/edit/edit_test.go
+++ b/pkg/cmd/pr/edit/edit_test.go
@@ -65,6 +65,20 @@ func TestNewCmdEdit(t *testing.T) {
 			},
 			wantsErr: false,
 		},
+		{
+			name:  "base flag",
+			input: "23 --base base-branch-name",
+			output: EditOptions{
+				SelectorArg: "23",
+				Editable: shared.Editable{
+					Base: shared.EditableString{
+						Value:  "base-branch-name",
+						Edited: true,
+					},
+				},
+			},
+			wantsErr: false,
+		},
 		{
 			name:  "add-reviewer flag",
 			input: "23 --add-reviewer monalisa,owner/core",
@@ -254,6 +268,10 @@ func Test_editRun(t *testing.T) {
 						Value:  "new body",
 						Edited: true,
 					},
+					Base: shared.EditableString{
+						Value:  "base-branch-name",
+						Edited: true,
+					},
 					Reviewers: shared.EditableSlice{
 						Add:    []string{"OWNER/core", "OWNER/external", "monalisa", "hubot"},
 						Remove: []string{"dependabot"},
@@ -303,6 +321,10 @@ func Test_editRun(t *testing.T) {
 						Value:  "new body",
 						Edited: true,
 					},
+					Base: shared.EditableString{
+						Value:  "base-branch-name",
+						Edited: true,
+					},
 					Assignees: shared.EditableSlice{
 						Add:    []string{"monalisa", "hubot"},
 						Remove: []string{"octocat"},
diff --git a/pkg/cmd/pr/shared/editable.go b/pkg/cmd/pr/shared/editable.go
index 16faca4de..abcfc9b43 100644
--- a/pkg/cmd/pr/shared/editable.go
+++ b/pkg/cmd/pr/shared/editable.go
@@ -14,6 +14,7 @@ import (
 type Editable struct {
 	Title     EditableString
 	Body      EditableString
+	Base      EditableString
 	Reviewers EditableSlice
 	Assignees EditableSlice
 	Labels    EditableSlice
@@ -42,6 +43,7 @@ type EditableSlice struct {
 func (e Editable) Dirty() bool {
 	return e.Title.Edited ||
 		e.Body.Edited ||
+		e.Base.Edited ||
 		e.Reviewers.Edited ||
 		e.Assignees.Edited ||
 		e.Labels.Edited ||
diff --git a/pkg/cmdutil/args.go b/pkg/cmdutil/args.go
index 65f3ade51..ee9c5e350 100644
--- a/pkg/cmdutil/args.go
+++ b/pkg/cmdutil/args.go
@@ -21,6 +21,21 @@ func MinimumArgs(n int, msg string) cobra.PositionalArgs {
 	}
 }
 
+func ExactArgs(n int, msg string) cobra.PositionalArgs {
+
+	return func(cmd *cobra.Command, args []string) error {
+		if len(args) > n {
+			return &FlagError{Err: errors.New("too many arguments")}
+		}
+
+		if len(args) < n {
+			return &FlagError{Err: errors.New(msg)}
+		}
+
+		return nil
+	}
+}
+
 func NoArgsQuoteReminder(cmd *cobra.Command, args []string) error {
 	if len(args) < 1 {
 		return nil