diff --git a/CHANGELOG b/CHANGELOG
index 53de059a3..f6b5608e7 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -13,6 +13,7 @@ CHANGELOG Roundcube Webmail
 - Fix bug where a new saved search added after removing all searches wasn't added to the list (#7061)
 - Fix bug where a new contact group added after removing all groups from addressbook wasn't added to the list
 - Fix bug where Ctype extension wasn't required in Installer and INSTALL file (#7049)
+- Fix so install-jsdeps.sh removes Bootstrap's sourceMappingURL (#7035)
 
 RELEASE 1.4.1
 -------------
diff --git a/bin/install-jsdeps.sh b/bin/install-jsdeps.sh
index 785c84e32..c09051816 100755
--- a/bin/install-jsdeps.sh
+++ b/bin/install-jsdeps.sh
@@ -237,7 +237,7 @@ function extract_zipfile($package, $srcfile)
             echo "Extracting files $pattern into $destdir\n";
             exec(sprintf('%s -o %s %s -d %s', $UNZIP, escapeshellarg($srcfile), escapeshellarg($pattern), $destdir), $out, $retval);
             if ($retval !== 0) {
-                rcube::raise_error("Failed to unpack $pattern; " . join('; ' . $out));
+                rcube::raise_error("Failed to unpack $pattern; " . implode('; ' . $out));
             }
         }
     }
@@ -258,22 +258,35 @@ function extract_zipfile($package, $srcfile)
         foreach ($package['map'] as $src => $dest) {
             echo "Installing $sourcedir/$src into $destdir/$dest\n";
 
+            $dest_file = $destdir . '/' . $dest;
+            $src_file = $sourcedir . '/' . $src;
+
             // make sure the destination's parent directory exists
             if (strpos($dest, '/') !== false) {
-                $parentdir = dirname($destdir . '/' . $dest);
+                $parentdir = dirname($dest_file);
                 if (!is_dir($parentdir)) {
                     mkdir($parentdir, 0775, true);
                 }
             }
 
             // avoid copying source directory as a child into destination
-            if (is_dir($sourcedir . '/' . $src) && is_dir($destdir . '/' . $dest)) {
-                exec(sprintf('rm -rf %s/%s', $destdir, $dest));
+            if (is_dir($src_file) && is_dir($dest_file)) {
+                exec(sprintf('rm -rf %s', $dest_file));
             }
 
-            exec(sprintf('mv -f %s/%s %s/%s', $sourcedir, $src, $destdir, $dest), $out, $retval);
+            exec(sprintf('mv -f %s %s', $src_file, $dest_file), $out, $retval);
             if ($retval !== 0) {
-                rcube::raise_error("Failed to move $src into $destdir/$dest; " . join('; ' . $out));
+                rcube::raise_error("Failed to move $src into $dest_file; " . implode('; ' . $out));
+            }
+            // Remove sourceMappingURL
+            else if (isset($package['sourcemap']) && $package['sourcemap'] === false) {
+                if ($content = file($dest_file)) {
+                    $index = count($content);
+                    if (preg_match('|sourceMappingURL=|', $content[$index-1])) {
+                        array_pop($content);
+                        file_put_contents($dest_file, implode('', $content));
+                    }
+                }
             }
         }
 
@@ -285,7 +298,7 @@ function extract_zipfile($package, $srcfile)
         echo "Extracting zip archive into $destdir\n";
         exec(sprintf('%s -o %s -d %s', $UNZIP, escapeshellarg($srcfile), $destdir), $out, $retval);
         if ($retval !== 0) {
-            rcube::raise_error("Failed to unzip $srcfile; " . join('; ' . $out));
+            rcube::raise_error("Failed to unzip $srcfile; " . implode('; ' . $out));
         }
     }
 
diff --git a/jsdeps.json b/jsdeps.json
index 8d05b4df0..8638ac2b0 100644
--- a/jsdeps.json
+++ b/jsdeps.json
@@ -94,6 +94,7 @@
       "sha1": "ee9e9d6bbbb6181dc519778af2b38804a6aa62a4",
       "license": "MIT",
       "flat": true,
+      "sourcemap": false,
       "map": {
         "bootstrap.bundle.min.js": "bootstrap.bundle.min.js",
         "bootstrap.min.css": "bootstrap.min.css"