diff --git a/version/version.go b/version/version.go
index 3721d64..5ff9d2e 100644
--- a/version/version.go
+++ b/version/version.go
@@ -7,10 +7,10 @@ import (
 
 type Version string
 
-func (me Version) compareTo(other string) int {
+func (me Version) compareTo(other Version) int {
 	var (
 		meTab    = strings.Split(string(me), ".")
-		otherTab = strings.Split(other, ".")
+		otherTab = strings.Split(string(other), ".")
 	)
 	for i, s := range meTab {
 		var meInt, otherInt int
@@ -31,22 +31,22 @@ func (me Version) compareTo(other string) int {
 	return 0
 }
 
-func (me Version) LessThan(other string) bool {
+func (me Version) LessThan(other Version) bool {
 	return me.compareTo(other) == -1
 }
 
-func (me Version) LessThanOrEqualTo(other string) bool {
+func (me Version) LessThanOrEqualTo(other Version) bool {
 	return me.compareTo(other) <= 0
 }
 
-func (me Version) GreaterThan(other string) bool {
+func (me Version) GreaterThan(other Version) bool {
 	return me.compareTo(other) == 1
 }
 
-func (me Version) GreaterThanOrEqualTo(other string) bool {
+func (me Version) GreaterThanOrEqualTo(other Version) bool {
 	return me.compareTo(other) >= 0
 }
 
-func (me Version) Equal(other string) bool {
+func (me Version) Equal(other Version) bool {
 	return me.compareTo(other) == 0
 }
diff --git a/version/version_test.go b/version/version_test.go
index 4bebd0c..27c0536 100644
--- a/version/version_test.go
+++ b/version/version_test.go
@@ -5,7 +5,7 @@ import (
 )
 
 func assertVersion(t *testing.T, a, b string, result int) {
-	if r := Version(a).compareTo(b); r != result {
+	if r := Version(a).compareTo(Version(b)); r != result {
 		t.Fatalf("Unexpected version comparison result. Found %d, expected %d", r, result)
 	}
 }