diff --git a/src/scientific_plots/__init__.py b/src/scientific_plots/__init__.py
index 169c5e1dca4d94a9a34bc701c5de6abc63c1aa7d..0d1ba1d342f5f4b764a76a38b1b9896f47e5f660 100644
--- a/src/scientific_plots/__init__.py
+++ b/src/scientific_plots/__init__.py
@@ -5,4 +5,4 @@ useful across several different projects and repositories. It also contains
 stub-files with several data-type annotations for scipy and matplot-lib
 functions."""
 
-__version__ = "1.8.0"
+__version__ = "1.8.1"
diff --git a/src/scipy-stubs/constants.pyi b/src/scipy-stubs/constants.pyi
new file mode 100644
index 0000000000000000000000000000000000000000..2b63000c05f9a7b13f856c25b7408130b2356053
--- /dev/null
+++ b/src/scipy-stubs/constants.pyi
@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+"""
+Stub file for sciypy-constants.
+"""
+from typing import Dict, Tuple
+
+pi: float
+golden: float
+golden_ratio: float
+N_A: float
+Avogadro: float
+Boltzmann: float
+gas_constant: float
+
+
+def value(key: str) -> float: ...
+
+
+def unit(key: str) -> str: ...
+
+
+def precision(key: str) -> float: ...
+
+
+physical_constants: Dict[str, Tuple[float, str, float]]