diff --git a/taskcluster/test-armbian-opt-base.tyml b/taskcluster/test-armbian-opt-base.tyml
index 22115a46..3cf9e437 100644
--- a/taskcluster/test-armbian-opt-base.tyml
+++ b/taskcluster/test-armbian-opt-base.tyml
@@ -38,8 +38,8 @@ then:
         DEEPSPEECH_ARTIFACTS_ROOT: https://queue.taskcluster.net/v1/task/${linux_arm64_build}/artifacts/public
         DEEPSPEECH_NODEJS: https://queue.taskcluster.net/v1/task/${node_package_cpu}/artifacts/public
         DEEPSPEECH_TEST_MODEL: https://queue.taskcluster.net/v1/task/${training}/artifacts/public/output_graph.pb
-        DEEPSPEECH_PROD_MODEL: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.0/output_graph.pb
-        DEEPSPEECH_PROD_MODEL_MMAP: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.0/output_graph.pbmm
+        DEEPSPEECH_PROD_MODEL: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.4/output_graph.pb
+        DEEPSPEECH_PROD_MODEL_MMAP: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.4/output_graph.pbmm
         PIP_DEFAULT_TIMEOUT: "60"
         PIP_EXTRA_INDEX_URL: "https://lissyx.github.io/deepspeech-python-wheels/"
         EXTRA_PYTHON_CONFIGURE_OPTS: "--with-fpectl" # Required by Debian Stretch
diff --git a/taskcluster/test-darwin-opt-base.tyml b/taskcluster/test-darwin-opt-base.tyml
index 0007af6a..ea11e02d 100644
--- a/taskcluster/test-darwin-opt-base.tyml
+++ b/taskcluster/test-darwin-opt-base.tyml
@@ -43,8 +43,8 @@ then:
         DEEPSPEECH_ARTIFACTS_TFLITE_ROOT: https://queue.taskcluster.net/v1/task/${darwin_amd64_tflite}/artifacts/public
         DEEPSPEECH_NODEJS: https://queue.taskcluster.net/v1/task/${node_package_cpu}/artifacts/public
         DEEPSPEECH_TEST_MODEL: https://queue.taskcluster.net/v1/task/${training}/artifacts/public/output_graph.pb
-        DEEPSPEECH_PROD_MODEL: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.0/output_graph.pb
-        DEEPSPEECH_PROD_MODEL_MMAP: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.0/output_graph.pbmm
+        DEEPSPEECH_PROD_MODEL: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.4/output_graph.pb
+        DEEPSPEECH_PROD_MODEL_MMAP: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.4/output_graph.pbmm
         EXPECTED_TENSORFLOW_VERSION: "${build.tensorflow_git_desc}"
 
     command:
diff --git a/taskcluster/test-linux-opt-base.tyml b/taskcluster/test-linux-opt-base.tyml
index 59bb7d43..25a9d322 100644
--- a/taskcluster/test-linux-opt-base.tyml
+++ b/taskcluster/test-linux-opt-base.tyml
@@ -43,8 +43,8 @@ then:
         DEEPSPEECH_ARTIFACTS_TFLITE_ROOT: https://queue.taskcluster.net/v1/task/${linux_amd64_tflite}/artifacts/public
         DEEPSPEECH_NODEJS: https://queue.taskcluster.net/v1/task/${node_package_cpu}/artifacts/public
         DEEPSPEECH_TEST_MODEL: https://queue.taskcluster.net/v1/task/${training}/artifacts/public/output_graph.pb
-        DEEPSPEECH_PROD_MODEL: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.0/output_graph.pb
-        DEEPSPEECH_PROD_MODEL_MMAP: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.0/output_graph.pbmm
+        DEEPSPEECH_PROD_MODEL: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.4/output_graph.pb
+        DEEPSPEECH_PROD_MODEL_MMAP: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.4/output_graph.pbmm
         DECODER_ARTIFACTS_ROOT: https://queue.taskcluster.net/v1/task/${linux_amd64_ctc}/artifacts/public
         PIP_DEFAULT_TIMEOUT: "60"
         EXPECTED_TENSORFLOW_VERSION: "${build.tensorflow_git_desc}"
diff --git a/taskcluster/test-raspbian-opt-base.tyml b/taskcluster/test-raspbian-opt-base.tyml
index 1c333432..444cec05 100644
--- a/taskcluster/test-raspbian-opt-base.tyml
+++ b/taskcluster/test-raspbian-opt-base.tyml
@@ -38,8 +38,8 @@ then:
         DEEPSPEECH_ARTIFACTS_ROOT: https://queue.taskcluster.net/v1/task/${linux_rpi3_build}/artifacts/public
         DEEPSPEECH_NODEJS: https://queue.taskcluster.net/v1/task/${node_package_cpu}/artifacts/public
         DEEPSPEECH_TEST_MODEL: https://queue.taskcluster.net/v1/task/${training}/artifacts/public/output_graph.pb
-        DEEPSPEECH_PROD_MODEL: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.0/output_graph.pb
-        DEEPSPEECH_PROD_MODEL_MMAP: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.0/output_graph.pbmm
+        DEEPSPEECH_PROD_MODEL: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.4/output_graph.pb
+        DEEPSPEECH_PROD_MODEL_MMAP: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.4/output_graph.pbmm
         PIP_DEFAULT_TIMEOUT: "60"
         PIP_EXTRA_INDEX_URL: "https://www.piwheels.org/simple"
         EXTRA_PYTHON_CONFIGURE_OPTS: "--with-fpectl" # Required by Raspbian Stretch / PiWheels
diff --git a/taskcluster/test-win-opt-base.tyml b/taskcluster/test-win-opt-base.tyml
index d3249325..9bdb2faa 100644
--- a/taskcluster/test-win-opt-base.tyml
+++ b/taskcluster/test-win-opt-base.tyml
@@ -45,8 +45,8 @@ then:
         DEEPSPEECH_ARTIFACTS_TFLITE_ROOT: https://queue.taskcluster.net/v1/task/${win_amd64_tflite}/artifacts/public
         DEEPSPEECH_NODEJS: https://queue.taskcluster.net/v1/task/${node_package_cpu}/artifacts/public
         DEEPSPEECH_TEST_MODEL: https://queue.taskcluster.net/v1/task/${training}/artifacts/public/output_graph.pb
-        DEEPSPEECH_PROD_MODEL: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.0/output_graph.pb
-        DEEPSPEECH_PROD_MODEL_MMAP: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.0/output_graph.pbmm
+        DEEPSPEECH_PROD_MODEL: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.4/output_graph.pb
+        DEEPSPEECH_PROD_MODEL_MMAP: https://github.com/reuben/DeepSpeech/releases/download/v0.6.0-alpha.4/output_graph.pbmm
         EXPECTED_TENSORFLOW_VERSION: "${build.tensorflow_git_desc}"
         TC_MSYS_VERSION: 'MSYS_NT-6.3'
         MSYS: 'winsymlinks:nativestrict'