diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 4f0b5515..dc349db0 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## 0.11.1
+
+- Dismiss warning for fillna method for pandas 2.1
+- Fix channel.expand_dir() may add new column
+
 ## 0.11.0
 
 - Add Dockerfile for codesandbox
diff --git a/pipen/channel.py b/pipen/channel.py
index 978df973..fb6e25c8 100644
--- a/pipen/channel.py
+++ b/pipen/channel.py
@@ -191,7 +191,7 @@ def expand_dir(
         reverse,
     ).iloc[:, 0]
     ret = pandas.concat([data] * expanded.size, axis=0, ignore_index=True)
-    ret.loc[:, col_loc] = expanded.values
+    ret.iloc[:, col_loc] = expanded.values
     return ret.reset_index(drop=True)
 
 
diff --git a/pipen/proc.py b/pipen/proc.py
index d69eede7..3618574f 100644
--- a/pipen/proc.py
+++ b/pipen/proc.py
@@ -583,7 +583,7 @@ def _compute_input(self) -> Mapping[str, Mapping[str, Any]]:
             out.data = pandas.concat(
                 (req.output_data for req in self.requires),  # type: ignore
                 axis=1,
-            ).fillna(method="ffill")
+            ).ffill()
 
         make_df_colnames_unique_inplace(out.data)
 
diff --git a/pipen/version.py b/pipen/version.py
index d0a729d5..78f3023c 100644
--- a/pipen/version.py
+++ b/pipen/version.py
@@ -1,3 +1,3 @@
 """Provide version of pipen"""
 
-__version__ = "0.11.0"
+__version__ = "0.11.1"
diff --git a/pyproject.toml b/pyproject.toml
index 2be1621f..ae93e758 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.masonry.api"
 
 [tool.poetry]
 name = "pipen"
-version = "0.11.0"
+version = "0.11.1"
 description = "A pipeline framework for python"
 authors = [ "pwwang <pwwang@pwwang.com>",]
 license = "MIT"