diff --git a/source/Octopus.Client/Repositories/Async/RunbookRepository.cs b/source/Octopus.Client/Repositories/Async/RunbookRepository.cs
index 45347410b..21c14eac0 100644
--- a/source/Octopus.Client/Repositories/Async/RunbookRepository.cs
+++ b/source/Octopus.Client/Repositories/Async/RunbookRepository.cs
@@ -26,7 +26,7 @@ public RunbookRepository(IOctopusAsyncRepository repository)
             : base(repository, "Runbooks")
         {
             integrationTestVersion = SemanticVersion.Parse("0.0.0-local");
-            versionAfterWhichRunbookRunParametersAreAvailable = SemanticVersion.Parse("2020.2.99999");
+            versionAfterWhichRunbookRunParametersAreAvailable = SemanticVersion.Parse("2020.3.1");
         }
 
         public Task<RunbookResource> FindByName(ProjectResource project, string name)
@@ -58,7 +58,11 @@ private bool ServerSupportsRunbookRunParameters(string version)
         {
             var serverVersion = SemanticVersion.Parse(version);
 
-            return serverVersion >= versionAfterWhichRunbookRunParametersAreAvailable ||
+            // Note: We want to ensure the server version is >= *any* 2020.3.1, including all pre-releases to consider what may be rolled out to Octopus Cloud.
+            var preReleaseAgnosticServerVersion =
+                new SemanticVersion(serverVersion.Major, serverVersion.Minor, serverVersion.Patch);
+
+            return preReleaseAgnosticServerVersion >= versionAfterWhichRunbookRunParametersAreAvailable ||
                    serverVersion == integrationTestVersion;
         }
 
diff --git a/source/Octopus.Client/Repositories/RunbookRepository.cs b/source/Octopus.Client/Repositories/RunbookRepository.cs
index c0d8d4211..4941fed43 100644
--- a/source/Octopus.Client/Repositories/RunbookRepository.cs
+++ b/source/Octopus.Client/Repositories/RunbookRepository.cs
@@ -25,7 +25,7 @@ public RunbookRepository(IOctopusRepository repository)
             : base(repository, "Runbooks")
         {
             integrationTestVersion = SemanticVersion.Parse("0.0.0-local");
-            versionAfterWhichRunbookRunParametersAreAvailable = SemanticVersion.Parse("2020.2.99999");
+            versionAfterWhichRunbookRunParametersAreAvailable = SemanticVersion.Parse("2020.3.1");
         }
 
         public RunbookResource FindByName(ProjectResource project, string name)
@@ -57,7 +57,11 @@ private bool ServerSupportsRunbookRunParameters(string version)
         {
             var serverVersion = SemanticVersion.Parse(version);
 
-            return serverVersion >= versionAfterWhichRunbookRunParametersAreAvailable ||
+            // Note: We want to ensure the server version is >= *any* 2020.3.1, including all pre-releases to consider what may be rolled out to Octopus Cloud.
+            var preReleaseAgnosticServerVersion =
+                new SemanticVersion(serverVersion.Major, serverVersion.Minor, serverVersion.Patch);
+
+            return preReleaseAgnosticServerVersion >= versionAfterWhichRunbookRunParametersAreAvailable ||
                    serverVersion == integrationTestVersion;
         }