diff --git a/docs/make.jl b/docs/make.jl
index 6bb4851..2c663e7 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -6,7 +6,7 @@ makedocs(
 
     root = ".",
     source = "src",
-    build  = "build",
+    build = "build",
     clean = true,
     doctest = true,
     modules = Module[MetagraphOptimization],