diff --git a/docs/index.rst b/docs/index.rst
index e8a3f5a..3412d13 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -1,7 +1,7 @@
 Catima's documentation
 ======================
-C++ library for caclulalaton of energy loss, range, angular scattering and time of flight of the particle passing through matter.
-The library is based on physics used in the ATIMA code,however its not 100% copy of ATIMA physics.
+Catima is a C++ library for the calculation of the energy loss, range, angular scattering and time of flight of the particle passing through a matter.
+The library is based on the physics used in the ATIMA code,however its not a 100% copy of ATIMA physics.
  see CREDITS for more details.
 
 The WebAtima UI to this library can be found here: