diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5553d53..891291b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -100,6 +100,7 @@ Other changes
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
+| 3.51.4         | 2018-12-05     | `versions()` bugfix, optimization postgres |
 | 3.51.3         | 2018-11-27     | `mem()` refactoring parsing linux, code cleanup |
 | 3.51.2         | 2018-11-26     | `mem()` bugfix parsing `free` output linux |
 | 3.51.1         | 2018-11-26     | `processLoad()` bugfix windows |
diff --git a/lib/osinfo.js b/lib/osinfo.js
index b17eb07..14da889 100644
--- a/lib/osinfo.js
+++ b/lib/osinfo.js
@@ -303,7 +303,7 @@ function versions(callback) {
       };
 
       let functionProcessed = (function () {
-        let totalFunctions = 17;
+        let totalFunctions = 16;
         return function () {
           if (--totalFunctions === 0) {
             if (callback) {
@@ -347,22 +347,22 @@ function versions(callback) {
         });
         exec('gulp --version', function (error, stdout) {
           if (!error) {
-            result.gulp = stdout.toString().split('\n')[0] || '';
-            result.gulp = (result.gulp.toLowerCase().split('version')[1] || '').trim();
+            const gulp = stdout.toString().split('\n')[0] || '';
+            result.gulp = (gulp.toLowerCase().split('version')[1] || '').trim();
           }
           functionProcessed();
         });
         exec('tsc --version', function (error, stdout) {
           if (!error) {
-            result.tsc = stdout.toString().split('\n')[0] || '';
-            result.tsc = (result.tsc.toLowerCase().split('version')[1] || '').trim();
+            const tsc = stdout.toString().split('\n')[0] || '';
+            result.tsc = (tsc.toLowerCase().split('version')[1] || '').trim();
           }
           functionProcessed();
         });
         exec('grunt --version', function (error, stdout) {
           if (!error) {
-            result.grunt = stdout.toString().split('\n')[0] || '';
-            result.grunt = (result.grunt.toLowerCase().split('cli v')[1] || '').trim();
+            const grunt = stdout.toString().split('\n')[0] || '';
+            result.grunt = (grunt.toLowerCase().split('cli v')[1] || '').trim();
           }
           functionProcessed();
         });
@@ -372,9 +372,9 @@ function versions(callback) {
             if (!err) {
               exec('git --version', function (error, stdout) {
                 if (!error) {
-                  result.git = stdout.toString().split('\n')[0] || '';
-                  result.git = (result.git.toLowerCase().split('version')[1] || '').trim();
-                  result.git = (result.git.split(' ')[0] || '').trim();
+                  let git = stdout.toString().split('\n')[0] || '';
+                  git = (git.toLowerCase().split('version')[1] || '').trim();
+                  result.git = (git.split(' ')[0] || '').trim();
                 }
                 functionProcessed();
               });
@@ -383,41 +383,33 @@ function versions(callback) {
         } else {
           exec('git --version', function (error, stdout) {
             if (!error) {
-              result.git = stdout.toString().split('\n')[0] || '';
-              result.git = (result.git.toLowerCase().split('version')[1] || '').trim();
-              result.git = (result.git.split(' ')[0] || '').trim();
+              let git = stdout.toString().split('\n')[0] || '';
+              git = (git.toLowerCase().split('version')[1] || '').trim();
+              result.git = (git.split(' ')[0] || '').trim();
             }
             functionProcessed();
           });
         }
-        exec('git --version', function (error, stdout) {
-          if (!error) {
-            result.git = stdout.toString().split('\n')[0] || '';
-            result.git = (result.git.toLowerCase().split('version')[1] || '').trim();
-            result.git = (result.git.split(' ')[0] || '').trim();
-          }
-          functionProcessed();
-        });
         exec('nginx -v', function (error, stdout) {
           if (!error) {
-            result.nginx = stdout.toString().split('\n')[0] || '';
-            result.nginx = (result.nginx.toLowerCase().split('/')[1] || '').trim();
+            const nginx = stdout.toString().split('\n')[0] || '';
+            result.nginx = (nginx.toLowerCase().split('/')[1] || '').trim();
           }
           functionProcessed();
         });
         exec('mysql -V', function (error, stdout) {
           if (!error) {
-            result.mysql = stdout.toString().split('\n')[0] || '';
-            result.mysql = (result.mysql.toLowerCase().split(',')[0] || '').trim();
-            const parts = result.mysql.split(' ');
+            let mysql = stdout.toString().split('\n')[0] || '';
+            mysql = (mysql.toLowerCase().split(',')[0] || '').trim();
+            const parts = mysql.split(' ');
             result.mysql = (parts[parts.length - 1] || '').trim();
           }
           functionProcessed();
         });
         exec('php -v', function (error, stdout) {
           if (!error) {
-            result.php = stdout.toString().split('\n')[0] || '';
-            let parts = result.php.split('(');
+            const php = stdout.toString().split('\n')[0] || '';
+            let parts = php.split('(');
             if (parts[0].indexOf('-')) {
               parts = parts[0].split('-');
             }
@@ -427,8 +419,8 @@ function versions(callback) {
         });
         exec('redis-server --version', function (error, stdout) {
           if (!error) {
-            result.redis = stdout.toString().split('\n')[0] || '';
-            const parts = result.redis.split(' ');
+            const redis = stdout.toString().split('\n')[0] || '';
+            const parts = redis.split(' ');
             result.redis = util.getValue(parts, 'v', '=', true);
           }
           functionProcessed();
@@ -450,19 +442,39 @@ function versions(callback) {
         });
         exec('mongod --version', function (error, stdout) {
           if (!error) {
-            result.mongodb = stdout.toString().split('\n')[0] || '';
-            result.mongodb = (result.mongodb.toLowerCase().split(',')[0] || '').replace(/[^0-9.]/g, '');
-          }
-          functionProcessed();
-        });
-        exec('postgres -V', function (error, stdout) {
-          if (!error) {
-            const postgresql = stdout.toString().split('\n')[0].split(' ') || [];
-            result.postgresql = postgresql.length ? postgresql[postgresql.length - 1] : '';
-            result.mongodb = (result.mongodb.toLowerCase().split(',')[0] || '').replace(/[^0-9.]/g, '');
+            const mongodb = stdout.toString().split('\n')[0] || '';
+            result.mongodb = (mongodb.toLowerCase().split(',')[0] || '').replace(/[^0-9.]/g, '');
           }
           functionProcessed();
         });
+        if (_linux) {
+          exec('locate bin/postgres', function (error, stdout) {
+            if (!error) {
+              const postgresqlBin = stdout.toString().split('\n').sort();
+              if (postgresqlBin.length) {
+                exec(postgresqlBin[postgresqlBin.length - 1] + ' -V', function (error, stdout) {
+                  if (!error) {
+                    const postgresql = stdout.toString().split('\n')[0].split(' ') || [];
+                    result.postgresql = postgresql.length ? postgresql[postgresql.length - 1] : '';
+                  }
+                  functionProcessed();
+                });
+              } else {
+                functionProcessed();
+              }
+            } else {
+              functionProcessed();
+            }
+          });
+        } else {
+          exec('postgres -V', function (error, stdout) {
+            if (!error) {
+              const postgresql = stdout.toString().split('\n')[0].split(' ') || [];
+              result.postgresql = postgresql.length ? postgresql[postgresql.length - 1] : '';
+            }
+            functionProcessed();
+          });
+        }
       } catch (e) {
         if (callback) { callback(result); }
         resolve(result);
@@ -471,7 +483,6 @@ function versions(callback) {
   });
 }
 
-
 exports.versions = versions;
 
 function shell(callback) {