diff --git a/internal/app/ui.go b/internal/app/ui.go
index f1a4954..91a40e0 100644
--- a/internal/app/ui.go
+++ b/internal/app/ui.go
@@ -6,7 +6,7 @@ import (
 	"github.com/gdamore/tcell/v2"
 	"github.com/jordanorelli/astro-domu/internal/exit"
 	"github.com/jordanorelli/astro-domu/internal/server"
-	"github.com/jordanorelli/astro-domu/internal/sim"
+	"github.com/jordanorelli/astro-domu/internal/server/sim"
 	"github.com/jordanorelli/astro-domu/internal/wire"
 	"github.com/jordanorelli/blammo"
 )
diff --git a/internal/app/view.go b/internal/app/view.go
index 626ac1b..bc39911 100644
--- a/internal/app/view.go
+++ b/internal/app/view.go
@@ -2,7 +2,7 @@ package app
 
 import (
 	"github.com/gdamore/tcell/v2"
-	"github.com/jordanorelli/astro-domu/internal/sim"
+	"github.com/jordanorelli/astro-domu/internal/server/sim"
 	"github.com/jordanorelli/astro-domu/internal/wire"
 )
 
diff --git a/internal/server/server.go b/internal/server/server.go
index e28f8eb..646ecd0 100644
--- a/internal/server/server.go
+++ b/internal/server/server.go
@@ -12,7 +12,7 @@ import (
 
 	"github.com/gorilla/websocket"
 	"github.com/jordanorelli/astro-domu/internal/errors"
-	"github.com/jordanorelli/astro-domu/internal/sim"
+	"github.com/jordanorelli/astro-domu/internal/server/sim"
 	"github.com/jordanorelli/astro-domu/internal/wire"
 	"github.com/jordanorelli/blammo"
 )
diff --git a/internal/server/session.go b/internal/server/session.go
index 79603e3..ac35dd0 100644
--- a/internal/server/session.go
+++ b/internal/server/session.go
@@ -6,7 +6,7 @@ import (
 	"time"
 
 	"github.com/gorilla/websocket"
-	"github.com/jordanorelli/astro-domu/internal/sim"
+	"github.com/jordanorelli/astro-domu/internal/server/sim"
 	"github.com/jordanorelli/astro-domu/internal/wire"
 	"github.com/jordanorelli/blammo"
 )
diff --git a/internal/sim/effect.go b/internal/server/sim/effect.go
similarity index 100%
rename from internal/sim/effect.go
rename to internal/server/sim/effect.go
diff --git a/internal/sim/entity.go b/internal/server/sim/entity.go
similarity index 100%
rename from internal/sim/entity.go
rename to internal/server/sim/entity.go
diff --git a/internal/sim/floor.go b/internal/server/sim/floor.go
similarity index 100%
rename from internal/sim/floor.go
rename to internal/server/sim/floor.go
diff --git a/internal/sim/player.go b/internal/server/sim/player.go
similarity index 100%
rename from internal/sim/player.go
rename to internal/server/sim/player.go
diff --git a/internal/sim/point.go b/internal/server/sim/point.go
similarity index 100%
rename from internal/sim/point.go
rename to internal/server/sim/point.go
diff --git a/internal/sim/request.go b/internal/server/sim/request.go
similarity index 100%
rename from internal/sim/request.go
rename to internal/server/sim/request.go
diff --git a/internal/sim/room.go b/internal/server/sim/room.go
similarity index 100%
rename from internal/sim/room.go
rename to internal/server/sim/room.go
diff --git a/internal/sim/tile.go b/internal/server/sim/tile.go
similarity index 100%
rename from internal/sim/tile.go
rename to internal/server/sim/tile.go
diff --git a/internal/sim/world.go b/internal/server/sim/world.go
similarity index 100%
rename from internal/sim/world.go
rename to internal/server/sim/world.go