diff --git a/sbi/inference/posteriors/mcmc_posterior.py b/sbi/inference/posteriors/mcmc_posterior.py
index f54e94b86..ecee1682b 100644
--- a/sbi/inference/posteriors/mcmc_posterior.py
+++ b/sbi/inference/posteriors/mcmc_posterior.py
@@ -399,7 +399,7 @@ def _pyro_mcmc(
             warmup_steps=warmup_steps,
             initial_params={"": initial_params},
             num_chains=num_chains,
-            mp_context="fork",
+            mp_context="spawn",
             disable_progbar=not show_progress_bars,
             transforms={},
         )