diff --git a/poetry.lock b/poetry.lock
index a31e475d9aa3dfeff6610675d2d419a9328bcb61..5d78fad530c25606ad7caca7ff63cbad950dc017 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1950,7 +1950,7 @@ testing = ["pytest (>=3.5,<3.7.3 || >3.7.3)", "pytest-checkdocs (>=1.2.3)", "pyt
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "3ea95d61a58689b29cfd951e057fb15db09c21351ac9502acffeb9e478178468"
+content-hash = "e84807bde6dac9fea43fc34789a00755423e5f434e9d6e62cedce7c8591b1963"
 
 [metadata.files]
 alabaster = [
diff --git a/pyproject.toml b/pyproject.toml
index 4382be8c7afd1b46c59916f6a8b068eede5ce0c7..f6a527f680e093252a695e09b94e64eed9ad59e5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ secondary = true
 [tool.poetry.dependencies]
 python = "^3.7"
 calendarweek = "^0.4.6"
-aleksis-core = "^2.0a3"
+aleksis-core = "^2.0a3.dev0"
 
 [tool.poetry.dev-dependencies]
 sphinx = "^3.0"