diff --git a/README.md b/README.md
index a643033..210fc64 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ and pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://tinyletter.com/jbranchaud).
 
-_903 TILs and counting..._
+_904 TILs and counting..._
 
 ---
 
@@ -28,6 +28,7 @@ _903 TILs and counting..._
 * [JavaScript](#javascript)
 * [Linux](#linux)
 * [Mac](#mac)
+* [MongoDB](#mongodb)
 * [MySQL](#mysql)
 * [Phoenix](#phoenix)
 * [PostgreSQL](#postgresql)
@@ -382,6 +383,10 @@ _903 TILs and counting..._
 - [Specify App When Opening From Command Line](mac/specify-app-when-opening-from-command-line.md)
 - [View All Windows Of The Current App](mac/view-all-windows-of-the-current-app.md)
 
+### MongoDB
+
+- [Determine The Database Version](mongodb/determine-the-database-version.md)
+
 ### MySQL
 
 - [Display Output In A Vertical Format](mysql/display-output-in-a-vertical-format.md)
diff --git a/mongodb/determine-the-database-version.md b/mongodb/determine-the-database-version.md
new file mode 100644
index 0000000..bd0a148
--- /dev/null
+++ b/mongodb/determine-the-database-version.md
@@ -0,0 +1,14 @@
+# Determine The Database Version
+
+Whether your Mongo database is local or remote, you should connect to it using
+the [`mongo` CLI](https://docs.mongodb.com/manual/mongo/).
+
+Once connected, you can issue the following query:
+
+```
+db.version()
+```
+
+This will output the version of your Mongo database.
+
+[source](https://docs.mongodb.com/manual/reference/method/db.version/)