diff --git a/.github/workflows/run-aishell-2022-06-20.yml b/.github/workflows/run-aishell-2022-06-20.yml
index d14196f38..53fcb2c03 100644
--- a/.github/workflows/run-aishell-2022-06-20.yml
+++ b/.github/workflows/run-aishell-2022-06-20.yml
@@ -45,7 +45,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-gigaspeech-2022-05-13.yml b/.github/workflows/run-gigaspeech-2022-05-13.yml
index 0e47f7538..3121520c1 100644
--- a/.github/workflows/run-gigaspeech-2022-05-13.yml
+++ b/.github/workflows/run-gigaspeech-2022-05-13.yml
@@ -44,7 +44,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-librispeech-2022-03-12.yml b/.github/workflows/run-librispeech-2022-03-12.yml
index 3edbe43ec..f092e3c80 100644
--- a/.github/workflows/run-librispeech-2022-03-12.yml
+++ b/.github/workflows/run-librispeech-2022-03-12.yml
@@ -44,7 +44,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-librispeech-2022-04-29.yml b/.github/workflows/run-librispeech-2022-04-29.yml
index bb44a073b..f8f4d9977 100644
--- a/.github/workflows/run-librispeech-2022-04-29.yml
+++ b/.github/workflows/run-librispeech-2022-04-29.yml
@@ -44,7 +44,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-librispeech-2022-05-13.yml b/.github/workflows/run-librispeech-2022-05-13.yml
index e7b53b21c..dc20185da 100644
--- a/.github/workflows/run-librispeech-2022-05-13.yml
+++ b/.github/workflows/run-librispeech-2022-05-13.yml
@@ -44,7 +44,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-librispeech-pruned-transducer-stateless3-2022-05-13.yml b/.github/workflows/run-librispeech-pruned-transducer-stateless3-2022-05-13.yml
index bf73d4f18..3fb0920bc 100644
--- a/.github/workflows/run-librispeech-pruned-transducer-stateless3-2022-05-13.yml
+++ b/.github/workflows/run-librispeech-pruned-transducer-stateless3-2022-05-13.yml
@@ -44,7 +44,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-librispeech-streaming-transducer-stateless2-2022-06-26.yml b/.github/workflows/run-librispeech-streaming-transducer-stateless2-2022-06-26.yml
index 6ea308468..67a6f6fc4 100644
--- a/.github/workflows/run-librispeech-streaming-transducer-stateless2-2022-06-26.yml
+++ b/.github/workflows/run-librispeech-streaming-transducer-stateless2-2022-06-26.yml
@@ -44,7 +44,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-librispeech-transducer-stateless2-2022-04-19.yml b/.github/workflows/run-librispeech-transducer-stateless2-2022-04-19.yml
index 9fe2f0389..35ca08a31 100644
--- a/.github/workflows/run-librispeech-transducer-stateless2-2022-04-19.yml
+++ b/.github/workflows/run-librispeech-transducer-stateless2-2022-04-19.yml
@@ -44,7 +44,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-pretrained-conformer-ctc.yml b/.github/workflows/run-pretrained-conformer-ctc.yml
index bcd326b9d..6151a5a14 100644
--- a/.github/workflows/run-pretrained-conformer-ctc.yml
+++ b/.github/workflows/run-pretrained-conformer-ctc.yml
@@ -34,7 +34,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-pretrained-transducer-stateless-librispeech-100h.yml b/.github/workflows/run-pretrained-transducer-stateless-librispeech-100h.yml
index 1e5b25f5c..f8caee8e5 100644
--- a/.github/workflows/run-pretrained-transducer-stateless-librispeech-100h.yml
+++ b/.github/workflows/run-pretrained-transducer-stateless-librispeech-100h.yml
@@ -43,7 +43,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-pretrained-transducer-stateless-librispeech-multi-datasets.yml b/.github/workflows/run-pretrained-transducer-stateless-librispeech-multi-datasets.yml
index 9063c0ed6..7c3910eb8 100644
--- a/.github/workflows/run-pretrained-transducer-stateless-librispeech-multi-datasets.yml
+++ b/.github/workflows/run-pretrained-transducer-stateless-librispeech-multi-datasets.yml
@@ -43,7 +43,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-pretrained-transducer-stateless-modified-2-aishell.yml b/.github/workflows/run-pretrained-transducer-stateless-modified-2-aishell.yml
index 2d24528d3..ce6d6f92d 100644
--- a/.github/workflows/run-pretrained-transducer-stateless-modified-2-aishell.yml
+++ b/.github/workflows/run-pretrained-transducer-stateless-modified-2-aishell.yml
@@ -34,7 +34,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-pretrained-transducer-stateless-modified-aishell.yml b/.github/workflows/run-pretrained-transducer-stateless-modified-aishell.yml
index 761b26131..f0cebd94a 100644
--- a/.github/workflows/run-pretrained-transducer-stateless-modified-aishell.yml
+++ b/.github/workflows/run-pretrained-transducer-stateless-modified-aishell.yml
@@ -34,7 +34,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-pretrained-transducer-stateless.yml b/.github/workflows/run-pretrained-transducer-stateless.yml
index e46b9a849..1b69b97bf 100644
--- a/.github/workflows/run-pretrained-transducer-stateless.yml
+++ b/.github/workflows/run-pretrained-transducer-stateless.yml
@@ -43,7 +43,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false
 
diff --git a/.github/workflows/run-pretrained-transducer.yml b/.github/workflows/run-pretrained-transducer.yml
index 190e446bc..91d87f1c9 100644
--- a/.github/workflows/run-pretrained-transducer.yml
+++ b/.github/workflows/run-pretrained-transducer.yml
@@ -34,7 +34,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8]
 
       fail-fast: false