diff --git a/src/main/java/run/halo/app/theme/finders/impl/ContributorFinderImpl.java b/src/main/java/run/halo/app/theme/finders/impl/ContributorFinderImpl.java
index ecbcbf28b..60e6b7e55 100644
--- a/src/main/java/run/halo/app/theme/finders/impl/ContributorFinderImpl.java
+++ b/src/main/java/run/halo/app/theme/finders/impl/ContributorFinderImpl.java
@@ -36,6 +36,6 @@ public class ContributorFinderImpl implements ContributorFinder {
             return Flux.empty();
         }
         return Flux.fromIterable(names)
-            .flatMap(this::getContributor);
+            .concatMap(this::getContributor);
     }
 }
diff --git a/src/main/java/run/halo/app/theme/finders/impl/PostFinderImpl.java b/src/main/java/run/halo/app/theme/finders/impl/PostFinderImpl.java
index a59a6fe54..f49f91a43 100644
--- a/src/main/java/run/halo/app/theme/finders/impl/PostFinderImpl.java
+++ b/src/main/java/run/halo/app/theme/finders/impl/PostFinderImpl.java
@@ -127,7 +127,7 @@ public class PostFinderImpl implements PostFinder {
     @Override
     public Flux<ListedPostVo> listAll() {
         return client.list(Post.class, FIXED_PREDICATE, defaultComparator())
-            .flatMap(this::getListedPostVo);
+            .concatMap(this::getListedPostVo);
     }
 
     static Pair<String, String> postPreviousNextPair(List<String> postNames,
@@ -292,7 +292,7 @@ public class PostFinderImpl implements PostFinder {
         return client.list(Post.class, predicate,
                 comparator, pageNullSafe(page), sizeNullSafe(size))
             .flatMap(list -> Flux.fromStream(list.get())
-                .flatMap(post -> getListedPostVo(post)
+                .concatMap(post -> getListedPostVo(post)
                     .map(postVo -> {
                         populateStats(postVo);
                         return postVo;
diff --git a/src/main/java/run/halo/app/theme/finders/impl/SinglePageFinderImpl.java b/src/main/java/run/halo/app/theme/finders/impl/SinglePageFinderImpl.java
index d2b737d98..cac48a350 100644
--- a/src/main/java/run/halo/app/theme/finders/impl/SinglePageFinderImpl.java
+++ b/src/main/java/run/halo/app/theme/finders/impl/SinglePageFinderImpl.java
@@ -96,7 +96,7 @@ public class SinglePageFinderImpl implements SinglePageFinder {
                     populateStats(pageVo);
                     return pageVo;
                 })
-                .flatMap(this::populateContributors)
+                .concatMap(this::populateContributors)
                 .collectList()
                 .map(pageVos -> new ListResult<>(list.getPage(), list.getSize(), list.getTotal(),
                     pageVos)
diff --git a/src/main/java/run/halo/app/theme/finders/impl/TagFinderImpl.java b/src/main/java/run/halo/app/theme/finders/impl/TagFinderImpl.java
index 84109a914..d13173ceb 100644
--- a/src/main/java/run/halo/app/theme/finders/impl/TagFinderImpl.java
+++ b/src/main/java/run/halo/app/theme/finders/impl/TagFinderImpl.java
@@ -40,7 +40,7 @@ public class TagFinderImpl implements TagFinder {
     @Override
     public Flux<TagVo> getByNames(List<String> names) {
         return Flux.fromIterable(names)
-            .flatMap(this::getByName);
+            .concatMap(this::getByName);
     }
 
     @Override