Prefecture because of an increase of COVID-19 cases in France in the preceding month. All teams were mandated to remain in bubbles and not communicate with other squads. Only 5,000 individuals could be admitted to the track, and all had to test negative for the virus and wear a face mask for safety reasons. Circuit changes Modifications were made to the circuit at the exit of Mulsanne Corner. The gravel traps at the corner were extended. Updated safety fencing enabled the fence line to be moved back at different points in the turn. A larger, wider and thicker layer of asphalt was laid at both sides of the turn at the FIA's request to decrease the amount of disruption caused by a car going off. Work began in March 2020 and ended three months later in June. Entries The ACO received 75 applications for the 18 December 2019 entry deadline. It granted 62 invitations to the 24 Hours of Le Mans. Entries were divided between the Le Mans Prototype 1 (LMP1), Le Mans Prototype 2 (LMP2), Le Mans Grand Touring Endurance Professional (LMGTE Pro) and Le Mans Grand Touring Endurance Amateur (LMGTE Am) categories. Automatic entries Teams that won their class in the 2019 24 Hours of Le Mans, or won championships in the European Le Mans Series (ELMS), Asian Le Mans Series (ALMS), and the Michelin Le Mans Cup (MLMC) earned an automatic entry invitation. The second-place finishers in the ELMS in LMP2 and LMGTE championships also earned automatic invitations. The ACO chose two participants from the IMSA SportsCar Championship (IMSA) to be automatic entries regardless of their performance or category. As invitations were granted to teams, they could change their cars from the previous year but not their category. The LMGTE class invitees from the ELMS and ALMS could choose between the Pro and Am categories. ELMS' LMP3 (Le Mans Prototype 3) champion is required to field an entry in LMP2, while the ALMS LMP3 champion was permitted to choose between LMP2 or LMGTE Am. The MLMC Group GT3 (GT3) champion was invited to the LMGTE Am category. On 25 February 2020, the ACO announced the final list of automatic entries. Entry list The ACO announced the full 62 car entry list, plus ten reserves on 28 February. In addition to the 30 guaranteed WEC entries, 18 came from the ELMS, seven from IMSA, five from the ALMS