diff --git a/constraints.txt b/constraints.txt
index 026d0e551b6a..455610b304cf 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -2,10 +2,6 @@
 # 4.0+. The pin can be removed after nbformat is updated.
 jsonschema==3.2.0
 
-# Aer 0.12.1 has a bad value in the results output that prevents pickling.
-# Remove pin once https://github.com/Qiskit/qiskit-aer/pull/1845 is released.
-qiskit-aer==0.12.0
-
 # Numpy 1.25 deprecated some behaviours that we used, and caused the isometry
 # tests to flake. See https://github.com/Qiskit/qiskit-terra/issues/10305,
 # remove pin when resolving that.