Ouch

I never thought that getting paid in dollars would be to my disadvantage while living in Mexico. However, the Mexican peso is gaining strength against the dollar!!! Normally the conversion on my visa bill from pesos to dollars is about 10.5 pesos to 1 dollar. The conversion on my last visa transaction was 9.97 pesos to 1 dollar. What is going on here?! Should I start looking for jobs in Mexico that pay me in pesos? Messed up.