diff --git a/Cargo.lock b/Cargo.lock
index 2a56d78..285bb23 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1279,6 +1279,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "iced",
+ "tetris-logic",
 ]
 
 [[package]]
@@ -2912,6 +2913,14 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "tetris-logic"
+version = "0.1.0"
+source = "git+https://code.everydayimshuflin.com/greg/tetres#1c474f42ee104978fa91207197428e8ff2e374ec"
+dependencies = [
+ "rand",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.64"
diff --git a/Cargo.toml b/Cargo.toml
index dec7acc..b50b7d6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,6 @@ edition = "2021"
 [dependencies]
 anyhow = "1.0.89"
 iced = "0.13.1"
-
+tetris-logic = { git = "https://code.everydayimshuflin.com/greg/tetres" }