diff --git a/core/shared/src/main/scala/io/chrisdavenport/snickerdoodle/SnCookieJar.scala b/core/shared/src/main/scala/io/chrisdavenport/snickerdoodle/SnCookieJar.scala
index aefc87a..5a6be4e 100644
--- a/core/shared/src/main/scala/io/chrisdavenport/snickerdoodle/SnCookieJar.scala
+++ b/core/shared/src/main/scala/io/chrisdavenport/snickerdoodle/SnCookieJar.scala
@@ -12,18 +12,25 @@ private[snickerdoodle] object SnCookieJar {
   private[snickerdoodle] class Http4sPersistenceCookieJarImpl[F[_]: Concurrent: Clock](
     persistence: SnCookiePersistence[F],
     supervisor: Supervisor[F],
+    synchronousPersistence: Boolean,
     ref: Ref[F, Map[SnCookie.SnCookieKey, SnCookie]],
     isPublicSuffix: String => Boolean
   ) extends CookieJar[F]{
+
+    def persist[A](fa: F[A]): F[Unit] = {
+      if (synchronousPersistence) fa.void
+      else supervisor.supervise(fa).void
+    }
+
     def evictExpired: F[Unit] = for {
       now <- HttpDate.current[F].map(_.epochSecond)
       _ <- ref.update(_.filter(t => now <= t._2.expiry))
-      _ <- supervisor.supervise(persistence.clearExpired(now))
+      _ <- persist(persistence.clearExpired(now))
     } yield ()
     
     def evictAll: F[Unit] = 
-      ref.set(Map.empty) >> 
-      persistence.clear
+      ref.set(Map.empty) >>
+      persist(persistence.clear)
     
     def addCookies[G[_]: Foldable](cookies: G[(ResponseCookie, Uri)]): F[Unit] = 
       for {
@@ -36,7 +43,7 @@ private[snickerdoodle] object SnCookieJar {
             snO.fold(m)(v => m + v)
         }
         _ <- ref.update(m => m ++ map)
-        _ <- supervisor.supervise(map.toList.traverse_{ case (_, c) => if (c.persist) persistence.create(c) else Applicative[F].unit}).void
+        _ <- persist(map.toList.traverse_{ case (_, c) => if (c.persist) persistence.create(c) else Applicative[F].unit}).void
       } yield ()
     
     def enrichRequest[G[_]](r: Request[G]): F[Request[G]] = for {
@@ -51,7 +58,7 @@ private[snickerdoodle] object SnCookieJar {
         }
         (m ++ updatedMap, filtered)
       }
-      _ <- supervisor.supervise(cookies.traverse_(c => if (c.persist) persistence.updateLastAccessed(SnCookie.SnCookieKey.fromCookie(c),  c.lastAccessed) else Applicative[F].unit))
+      _ <- persist(cookies.traverse_(c => if (c.persist) persistence.updateLastAccessed(SnCookie.SnCookieKey.fromCookie(c),  c.lastAccessed) else Applicative[F].unit))
     } yield cookies.foldLeft(r){ case (r, c) => r.addCookie(SnCookie.toRequestCookie(c))}
     
   }
diff --git a/core/shared/src/main/scala/io/chrisdavenport/snickerdoodle/SnCookieJarBuilder.scala b/core/shared/src/main/scala/io/chrisdavenport/snickerdoodle/SnCookieJarBuilder.scala
index 2d37439..2ef9196 100644
--- a/core/shared/src/main/scala/io/chrisdavenport/snickerdoodle/SnCookieJarBuilder.scala
+++ b/core/shared/src/main/scala/io/chrisdavenport/snickerdoodle/SnCookieJarBuilder.scala
@@ -10,12 +10,14 @@ final class SnCookieJarBuilder[F[_]: Async] private (
   private val supervisorO: Option[Supervisor[F]],
   private val persistenceO: Option[Resource[F, SnCookiePersistence[F]]],
   private val isPublicSuffixO: Option[Resource[F, String => Boolean]],
-){ self => 
+  private val synchronousPersistence: Boolean,
+){ self =>
   def copy(
   supervisorO: Option[Supervisor[F]] = self.supervisorO,
   persistenceO: Option[Resource[F, SnCookiePersistence[F]]] = self.persistenceO,
-  isPublicSuffixO: Option[Resource[F, String => Boolean]] = self.isPublicSuffixO
-  ): SnCookieJarBuilder[F] = new SnCookieJarBuilder[F](supervisorO, persistenceO, isPublicSuffixO)
+  isPublicSuffixO: Option[Resource[F, String => Boolean]] = self.isPublicSuffixO,
+  synchronousPersistence: Boolean = self.synchronousPersistence
+  ): SnCookieJarBuilder[F] = new SnCookieJarBuilder[F](supervisorO, persistenceO, isPublicSuffixO, synchronousPersistence)
 
   def withSupervisor(s: Supervisor[F]) = copy(supervisorO = s.some)
 
@@ -24,6 +26,9 @@ final class SnCookieJarBuilder[F[_]: Async] private (
   def withPersistence(c: SnCookiePersistence[F]) = 
     copy(persistenceO = c.pure[Resource[F, *]].some)
 
+  def withSynchronousPersistence = copy(synchronousPersistence = true)
+  def withAsynchronousPersistence = copy(synchronousPersistence = false)
+
   def withoutPersistence = copy(persistenceO = None)
 
   def withIsPublicSuffix(f: String => Boolean) = copy(isPublicSuffixO = f.pure[Resource[F, *]].some)
@@ -44,7 +49,7 @@ final class SnCookieJarBuilder[F[_]: Async] private (
       )
     )
     isPublicSuffix <- isPublicSuffixO.getOrElse({(_: String) => false}.pure[Resource[F, *]])
-    out = tO.fold[CookieJar[F]](new SnCookieJar.Http4sMemoryCookieJarImpl[F](state, isPublicSuffix)){ case (cp, s) => new SnCookieJar.Http4sPersistenceCookieJarImpl[F](cp, s, state, isPublicSuffix)}
+    out = tO.fold[CookieJar[F]](new SnCookieJar.Http4sMemoryCookieJarImpl[F](state, isPublicSuffix)){ case (cp, s) => new SnCookieJar.Http4sPersistenceCookieJarImpl[F](cp, s, synchronousPersistence, state, isPublicSuffix)}
     _ <- Resource.eval(out.evictExpired)
   } yield out
 
@@ -66,16 +71,17 @@ final class SnCookieJarBuilder[F[_]: Async] private (
         )
       )
       isPublicSuffix <- isPublicSuffixO.getOrElse({(_: String) => false}.pure[Resource[F, *]])
-      cj = tO.fold[CookieJar[F]](new SnCookieJar.Http4sMemoryCookieJarImpl[F](state, isPublicSuffix)){ case (cp, s) => new SnCookieJar.Http4sPersistenceCookieJarImpl[F](cp, s, state, isPublicSuffix)}
+      cj = tO.fold[CookieJar[F]](new SnCookieJar.Http4sMemoryCookieJarImpl[F](state, isPublicSuffix)){ case (cp, s) => new SnCookieJar.Http4sPersistenceCookieJarImpl[F](cp, s,  synchronousPersistence, state, isPublicSuffix)}
       _ <- Resource.eval(cj.evictExpired)
     } yield (cj, state)
   }
 }
 
 object SnCookieJarBuilder {
-  def default[F[_]: Async]: SnCookieJarBuilder[F] = new SnCookieJarBuilder[F](None, None, Defaults.isPublicSuffix)
+  def default[F[_]: Async]: SnCookieJarBuilder[F] = new SnCookieJarBuilder[F](None, None, Defaults.isPublicSuffix, Defaults.synchronousPersistence)
 
   private object Defaults extends SnCookieJarBuilderDefaultsPlaftom {
+    val synchronousPersistence = true
 
   }
 }
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