diff --git a/meltano.yml b/meltano.yml
index 83c5774..b1ba912 100644
--- a/meltano.yml
+++ b/meltano.yml
@@ -40,7 +40,7 @@ plugins:
   mappers:
   - name: meltano-map-transformer
     namespace: meltano_map_transformer
-    pip_url: -e .
+    pip_url: --pre -e .
     executable: meltano-map-transform
     settings:
     - name: stream_maps
diff --git a/poetry.lock b/poetry.lock
index 603effa..70e6504 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1245,4 +1245,4 @@ test = ["big-O", "importlib-resources", "jaraco.functools", "jaraco.itertools",
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8"
-content-hash = "544e50deb8051bf4f230169a88ff36476deacaf30472753b1b0b16ff27ff3667"
+content-hash = "f798cf11db8fc8d8c645c3fac224246794b504e28fa6a401858ba52b8acca367"
diff --git a/pyproject.toml b/pyproject.toml
index b9bf4d3..3aa2af6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,8 @@ documentation = "https://github.com/MeltanoLabs/meltano-map-transform#readme"
 python = ">=3.8"
 
 [tool.poetry.dependencies.singer-sdk]
-version = "~=0.39.0"
+version = ">=0.39.0"
+allow-prereleases = true
 extras = [
   "faker",
 ]