diff --git a/README.md b/README.md
index 2d941320cb0026ed01ba39550e99141f6047d899..d7be2b1d53bc1dc333a66b6b231aa3f1c7c1f443 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ experimentation with various values is highly encouraged. Each problem will
 likely require different values and the sensitivity to the details of the
 physical model is something left to the users to explore.
 
-Acknowledgment & Citation
+Acknowledgement & Citation
 -------------------------
 
 The SWIFT code was last described in this paper:
@@ -66,7 +66,7 @@ their results.
 
 In order to keep track of usage and measure the impact of the software, we
 kindly ask users publishing scientific results using SWIFT to add the following
-sentence to the acknowledgment section of their papers:
+sentence to the acknowledgement section of their papers:
 
 "The research in this paper made use of the SWIFT open-source
 simulation code (http://www.swiftsim.com, Schaller et al. 2018)