diff --git a/rgb-yellowpaper.tex b/rgb-yellowpaper.tex
index bf3d660..686bbba 100644
--- a/rgb-yellowpaper.tex
+++ b/rgb-yellowpaper.tex
@@ -185,7 +185,7 @@ \subsection{Background}
 like in the case of the infamous Lightning network
 inbound liquidity \cite{lightningsucks1, lightningsucks4}, routing \cite{lightningsucks2} and 
 centralization issues \cite{lightningsucks3, lightningsucks5}\footnotemark.
-Also, all layer 2 solutions has the state which must be eventually published
+Also, all layer 2 solutions have state which must be eventually published
 to the blockchain, so, the state transition business logic also has to be global.
 This becomes especially an issue for blockchains designed for a
 ``Turing-complete'' contracts, serving a complete VM,