diff --git a/Project.toml b/Project.toml
index f7be0257d..bb5b8dd02 100644
--- a/Project.toml
+++ b/Project.toml
@@ -43,7 +43,7 @@ DynamicPPLZygoteRulesExt = ["ZygoteRules"]
 [compat]
 ADTypes = "1"
 AbstractMCMC = "5"
-AbstractPPL = "0.8.4"
+AbstractPPL = "0.8.4, 0.9"
 Accessors = "0.1"
 BangBang = "0.4.1"
 Bijectors = "0.13.9"
@@ -70,7 +70,7 @@ julia = "1.6"
 [extras]
 ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
 EnzymeCore = "f151be2c-9106-41f4-ab19-57ee4f262869"
-MCMCChains = "c7f686f2-ff18-58e9-bc7b-31028e88f75d"
-ZygoteRules = "700de1a5-db45-46bc-99cf-38207098b444"
 ForwardDiff = "f6369f11-7733-5829-9624-2563aa707210"
+MCMCChains = "c7f686f2-ff18-58e9-bc7b-31028e88f75d"
 ReverseDiff = "37e2e3b7-166d-5795-8a7a-e32c996b4267"
+ZygoteRules = "700de1a5-db45-46bc-99cf-38207098b444"