diff --git a/parser.go b/parser.go
index 57cbfac..c24cae6 100644
--- a/parser.go
+++ b/parser.go
@@ -441,10 +441,16 @@ func (p *Parser) parseTildeRange(version string) (*Range, error) {
 		}), nil
 	}
 
+	segments := strings.Count(version, ".") + 1
+
 	var upper string
-	if v.Minor > 0 || v.Patch > 0 {
+	if segments >= 2 {
+		// ~1.2.3 := >=1.2.3 <1.3.0
+		// ~1.0.0 := >=1.0.0 <1.1.0
+		// ~1.0   := >=1.0.0 <1.1.0
 		upper = fmt.Sprintf("%d.%d.0", v.Major, v.Minor+1)
 	} else {
+		// ~1 := >=1.0.0 <2.0.0
 		upper = fmt.Sprintf("%d.0.0", v.Major+1)
 	}
 
diff --git a/parser_test.go b/parser_test.go
index 39869fb..8a566f2 100644
--- a/parser_test.go
+++ b/parser_test.go
@@ -75,6 +75,12 @@ func TestParseNpmRange(t *testing.T) {
 		{"~1.2.3 excludes minor", "~1.2.3", "1.3.0", false},
 		{"~1.2.0 includes patch", "~1.2.0", "1.2.9", true},
 		{"~1.2.0 excludes minor", "~1.2.0", "1.3.0", false},
+		{"~1.0.0 includes patch", "~1.0.0", "1.0.9", true},
+		{"~1.0.0 excludes minor", "~1.0.0", "1.1.0", false},
+		{"~1.0 includes patch", "~1.0", "1.0.9", true},
+		{"~1.0 excludes minor", "~1.0", "1.1.0", false},
+		{"~1 includes minor", "~1", "1.9.0", true},
+		{"~1 excludes major", "~1", "2.0.0", false},
 
 		// X-ranges
 		{"1.x includes 1.0.0", "1.x", "1.0.0", true},