Kylie celebrated by sharing a sexy picture of herself with the caption "yummy" (in reference to Justin Bieber's latest hit), as well as a black and white shot of her with her family to show that there is no hard feelings.
The image showed Kylie, Kim, Kourtney, Khloé and North West at a picnic table all dressed in white - Kendall Jenner was notably absent from the shot.
The sisters seem to be in a competition, as Kim celebrated 150 million followers in October, surpassing Kylie's 148 million.
But despite their best efforts, Cristiano Ronaldo is the most followed individual on Instagram, with more than 195 million followers.
Singer Ariana Grande comes in second with 175 million followers, Dwayne "The Rock" Johnson comes in third with 166 million and Selena Gomez is fourth with 164 million.
Kylie is fifth and Kim is now sixth.