diff --git a/pyproject.toml b/pyproject.toml
index b34aa4400..1458e3eaa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -146,7 +146,12 @@ beir = [
   "beir; platform_system != 'Windows'",
 ]
 aws = [
-  "boto3"
+  "boto3",
+  # Costraint botocore to avoid taking to much time to resolve the dependency tree.
+  # boto3 used to constraint it at this version more than a year ago. To avoid breaking
+  # people using old versions we use a similar constraint without upper bound.
+  # https://github.com/boto/boto3/blob/dae73bef223abbedfa7317a783070831febc0c90/setup.py#L16
+  "botocore>=1.27",
 ]
 crawler = [
   "selenium>=4.0.0,!=4.1.4",  # Avoid 4.1.4 due to https://github.com/SeleniumHQ/selenium/issues/10612
@@ -185,7 +190,7 @@ metrics = [  # for metrics
   "scipy>=1.3.2",
   "rapidfuzz>=2.0.15,<2.8.0",   # FIXME https://github.com/deepset-ai/haystack/pull/3199
   "seqeval",
-  "mlflow<2.4.0",
+  "mlflow",
 ]
 ray = [
   "ray[serve]>=1.9.1,<2; platform_system != 'Windows'",
@@ -219,6 +224,10 @@ dev = [
   "watchdog",
   "toml",
   "reno",
+  # dulwich is a reno dependency, they pin it at >=0.15.0 so pip takes ton of time to resolve the dependency tree.
+  # We pin it here to avoid taking too much time.
+  # https://opendev.org/openstack/reno/src/branch/master/requirements.txt#L7
+  "dulwich>=0.21.0,<1.0.0",
 ]
 
 formatting = [