diff --git a/src/numpy_pandas/signal_processing.py b/src/numpy_pandas/signal_processing.py
index 0fe8e2c..97a2bf7 100644
--- a/src/numpy_pandas/signal_processing.py
+++ b/src/numpy_pandas/signal_processing.py
@@ -7,8 +7,7 @@ def manual_convolution_1d(signal: np.ndarray, kernel: np.ndarray) -> np.ndarray:
     result_len = signal_len - kernel_len + 1
     result = np.zeros(result_len)
     for i in range(result_len):
-        for j in range(kernel_len):
-            result[i] += signal[i + j] * kernel[j]
+        result[i] = np.dot(signal[i : i + kernel_len], kernel)
     return result