diff --git a/src/backend/pyproject.toml b/src/backend/pyproject.toml
index 64858e3..f850ab6 100644
--- a/src/backend/pyproject.toml
+++ b/src/backend/pyproject.toml
@@ -17,7 +17,7 @@ dependencies = [
     "xgboost>=3.3.0",
     "lightgbm>=4.0.0",
     "openpyxl>=3.1.0",
-    "imbalanced-learn>=0.12.0",
+    "imbalanced-learn>=0.14.2",
     "pyjwt>=2.8.0",
     "bcrypt>=4.1.0",
     "cryptography>=41.0.0",
diff --git a/src/backend/uv.lock b/src/backend/uv.lock
index 5d74154..3c34b85 100644
--- a/src/backend/uv.lock
+++ b/src/backend/uv.lock
@@ -123,7 +123,7 @@ requires-dist = [
     { name = "cryptography", specifier = ">=41.0.0" },
     { name = "fastapi", specifier = ">=0.138.1" },
     { name = "httpx", marker = "extra == 'dev'", specifier = ">=0.27.0" },
-    { name = "imbalanced-learn", specifier = ">=0.12.0" },
+    { name = "imbalanced-learn", specifier = ">=0.14.2" },
     { name = "lightgbm", specifier = ">=4.0.0" },
     { name = "numpy", specifier = ">=2.5.0" },
     { name = "openpyxl", specifier = ">=3.1.0" },
@@ -697,7 +697,7 @@ wheels = [
 
 [[package]]
 name = "imbalanced-learn"
-version = "0.14.1"
+version = "0.14.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "joblib" },
@@ -707,9 +707,9 @@ dependencies = [
     { name = "sklearn-compat" },
     { name = "threadpoolctl" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/c1/7d/f1384d3c0eefb5531b4dc05c191aba260f78e4d4bdd31a0c2a3394de5c8d/imbalanced_learn-0.14.1.tar.gz", hash = "sha256:46eeb5773a96b6fa92426356da66f3e4390a7ed8e715a633c6fb68ee4a3ccdcb", size = 1190412, upload-time = "2025-12-21T21:59:16.457Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/ad/35/d12fc1e8e2c2d8862104c4527641fe2d839324c50db0e6340dc73513faba/imbalanced_learn-0.14.2.tar.gz", hash = "sha256:f80ce7eafbcece8686e32571bd12978546c729c3f277215bead61a906ce9afe4", size = 19172446, upload-time = "2026-06-07T21:41:16.638Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c7/b5/56f1ceb568676c0231d12b2fed17ebfd606dd1f627e7372aaed5dd56bd97/imbalanced_learn-0.14.1-py3-none-any.whl", hash = "sha256:fcdff8d27870d6992ea3496230788b97ff98e24302e7f6c598701da525ae440f", size = 235365, upload-time = "2025-12-21T21:59:14.959Z" },
+    { url = "https://files.pythonhosted.org/packages/91/54/760ccac7d8feeea0c191767a6b025d3ca5014084443ff48afb6fb24ef056/imbalanced_learn-0.14.2-py3-none-any.whl", hash = "sha256:f9b81c47231aa1e3a71a1e4b3cc85b42e3b14f85e3a36922f3323c4da23605ef", size = 236073, upload-time = "2026-06-07T21:41:12.384Z" },
 ]
 
 [[package]]