diff --git a/README.md b/README.md
index 3a86969..6c77c3d 100644
--- a/README.md
+++ b/README.md
@@ -131,7 +131,7 @@ You may go to the [doc](docs/index.md) for a more detailed documentation of the
 * divide:      Divide an input alignment in several output files (one per alignment)
 * draw:   Draw alignments
   * biojs:     Display an input alignment in an html file using [BioJS](http://msa.biojs.net/)
-* identical: Tells wether two alignments are identical
+* identical: Tells whether two alignments are identical
 * mutate: Adds substitutions (~sequencing errors), or gaps, uniformly in an input alignment
   * gaps: Adds gaps uniformly in an input alignment
   * snvs: Adds substitutions uniformly in an input alignment
diff --git a/cmd/identical.go b/cmd/identical.go
index 5cc97b1..8d748b0 100644
--- a/cmd/identical.go
+++ b/cmd/identical.go
@@ -12,8 +12,8 @@ var compalign string
 
 var identicalCmd = &cobra.Command{
 	Use:   "identical",
-	Short: "Assess wether the two alignments are identical",
-	Long: `Assess wether the two alignments are identical.
+	Short: "Assess whether the two alignments are identical",
+	Long: `Assess whether the two alignments are identical.
 
 `,
 	RunE: func(cmd *cobra.Command, args []string) (err error) {
diff --git a/docs/api/identical.md b/docs/api/identical.md
index 3b6f0e2..0200147 100644
--- a/docs/api/identical.md
+++ b/docs/api/identical.md
@@ -4,7 +4,7 @@
 
 ### identical
 
-Telling wether two alignments are identical
+Telling whether two alignments are identical
 
 ```go
 package main
diff --git a/docs/commands/identical.md b/docs/commands/identical.md
index 2a8146c..99ca60a 100644
--- a/docs/commands/identical.md
+++ b/docs/commands/identical.md
@@ -3,7 +3,7 @@
 ## Commands
 
 ### identical
-Tells wether two alignments are identical.
+Tells whether two alignments are identical.
 
 Alignments are considered identical if:
 
diff --git a/docs/index.md b/docs/index.md
index 6e6956e..96d6781 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -69,7 +69,7 @@ Command                                                     | Subcommand |
 [divide](commands/divide.md) ([api](api/divide.md))         |            | Divide an input alignment in several output files
 [draw](commands/draw.md) ([api](api/draw.md))               |            | Draws an input alignment
 --                                                          | biojs      | Displays an input alignment in an html file using biojs
-[identical](commands/identical.md) ([api](api/identical.md))|            | Tells wether two alignments are identical
+[identical](commands/identical.md) ([api](api/identical.md))|            | Tells whether two alignments are identical
 [mutate](commands/mutate.md) ([api](api/mutate.md))         |            | Adds substitutions (~sequencing errors), or gaps, uniformly in an input alignment
 --                                                          | gaps       | Adds gaps uniformly in an input alignment
 --                                                          | snvs       | Adds substitutions uniformly in an input alignment