diff --git a/Truncate.js b/Truncate.js
index a9e6119..2ed53fd 100644
--- a/Truncate.js
+++ b/Truncate.js
@@ -98,7 +98,7 @@ class Truncate extends Component {
         this.prop = {
             get height () {
                 let viewportOffset = element.getBoundingClientRect();
-                return parseInt(viewportOffset.bottom - viewportOffset.top, 10);
+                return parseInt(viewportOffset.bottom - viewportOffset.top - 1, 10);
             },
             get lineheight () {
                 let lineh = getComputedStyle(element).getPropertyValue('line-height');
diff --git a/index.js b/index.js
index 08f3586..14fe8ff 100644
--- a/index.js
+++ b/index.js
@@ -146,7 +146,7 @@ var Truncate = function (_Component) {
             this.prop = {
                 get height() {
                     var viewportOffset = element.getBoundingClientRect();
-                    return parseInt(viewportOffset.bottom - viewportOffset.top, 10);
+                    return parseInt(viewportOffset.bottom - viewportOffset.top - 1, 10);
                 },
                 get lineheight() {
                     var lineh = getComputedStyle(element).getPropertyValue('line-height');
diff --git a/package.json b/package.json
index 3e666b2..66fb112 100644
--- a/package.json
+++ b/package.json
@@ -17,8 +17,8 @@
         "babel-preset-stage-0": "^6.16.0"
     },
     "peerDependencies": {
-        "react": "^15.3.2",
-        "prop-types": "^15.6.0"
+        "react": "^16.2.0",
+        "prop-types": "^15.5.0"
     },
     "repository": {
         "type": "git",