diff --git a/lib/gui/css/main.css b/lib/gui/css/main.css
index e44af0d4..3aec538c 100644
--- a/lib/gui/css/main.css
+++ b/lib/gui/css/main.css
@@ -5976,6 +5976,9 @@ body {
 [uib-tooltip] {
   cursor: default; }
 
+.tooltip {
+  word-wrap: break-word; }
+
 /*
  * Copyright 2016 resin.io
  *
diff --git a/lib/gui/scss/modules/_bootstrap.scss b/lib/gui/scss/modules/_bootstrap.scss
index afe9987b..1381d388 100644
--- a/lib/gui/scss/modules/_bootstrap.scss
+++ b/lib/gui/scss/modules/_bootstrap.scss
@@ -35,3 +35,8 @@ body {
 [uib-tooltip] {
   cursor: default;
 }
+
+.tooltip {
+  word-wrap: break-word;
+}
+