diff --git a/src/logue.nim b/src/logue.nim
index a5dce7a..83beb4c 100644
--- a/src/logue.nim
+++ b/src/logue.nim
@@ -1,10 +1,10 @@
 import cligen
 
-import loguepkg/[create, execute]
+import loguepkg/[create, execute, extend]
 
 
 proc main*() =
-  dispatchMulti([init], [run])
+  dispatchMulti([init], [run], [extension])
 
 when isMainModule:
   main()
diff --git a/src/loguepkg/extend.nim b/src/loguepkg/extend.nim
new file mode 100644
index 0000000..8b7c23f
--- /dev/null
+++ b/src/loguepkg/extend.nim
@@ -0,0 +1,46 @@
+import os, strformat, osproc, strutils
+
+const
+  nimbleFile = "prologue.nimble"
+
+
+template withDir(dir: string; body: untyped): untyped =
+  var curDir = getCurrentDir()
+  try:
+    setCurrentDir(dir)
+    body
+  finally:
+    setCurrentDir(curDir)
+
+proc extension*(name: seq[string]) =
+  if name.len == 0:
+    echo "Please give the name of the extension or use logue extension all to install all extensions"
+  else:
+    # TODO May raise OsError in windows
+    var output: string
+    var errC: int
+    if fileExists(nimbleFile):
+      (output, errC) = (nimbleFile, 0)
+    else:
+      (output, errC) = execCmdEx("nimble path prologue")
+    if errC == 0:
+      stripLineEnd(output)
+      normalizePath(output)
+
+      withDir output:
+        var errC: int
+
+        let extension = name[0]
+
+        if extension == "all":
+          discard execCmd(fmt"nimble extension")
+        else:
+          try:
+            errC = execCmd(fmt"nimble {extension}")
+          except OSError:
+            errC = 1
+
+        if errC != 0:
+          echo "Please give the right name of the extension"
+    else:
+      echo "Please install prologue or check whther nimble is added to path"