Provided is a Fischer Tropsch catalyst prepared according to a process comprising: a. preparing a catalyst precursor by: i. impregnating an alumina catalyst support material with a first solution comprising ammonium metavanadate and phosphoric acid, to obtain a treated catalyst support material; ii. calcining the treated catalyst support material at a temperature of at least 500° C. to obtain a modified catalyst support having a modified support surface area and a pore volume of at least 0.4 cc/g; wherein the modified catalyst support loses no more than 8% of the pore volume when exposed to a water vapor; and iii. contacting the modified catalyst support with a second solution comprising a precursor compound of an active cobalt catalyst component and glutaric acid to obtain the catalyst precursor; and b. reducing the catalyst precursor to activate the catalyst precursor to obtain the Fischer Tropsch catalyst.