diff --git a/dockerfile b/dockerfile
index 580bf99..d737ca6 100644
--- a/dockerfile
+++ b/dockerfile
@@ -1,4 +1,4 @@
-ARG IFLAGS="--quiet --no-cache-dir --user --use-feature=in-tree-build"
+ARG IFLAGS="--quiet --no-cache-dir --user"
 
 FROM python:3.9.9-slim-bullseye as build
 ARG IFLAGS
diff --git a/pyproject.toml b/pyproject.toml
index d7f3ae1..56795fd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,6 @@
 [build-system]
 requires = [
+    "pip>=21.3.1",
     "setuptools>=57.4.0",
     "setuptools_scm[toml]>=4.1.2",
     "wheel>=0.35.1",
diff --git a/setup.py b/setup.py
index 3485ad4..a5e1ce1 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
     ),
     "numpy>=1.15.4",
     "pandas>=0.23.4",
-    "pip>=21.2.2",
+    "pip>=21.3.1",
     "requests>=2.26.0",
     "setuptools>=57.4.0",
     "wheel>=0.35.1",