diff --git a/core-services/prow/02_config/_boskos.yaml b/core-services/prow/02_config/_boskos.yaml
index c9c2c7cac62b5..5618c84b97d2e 100644
--- a/core-services/prow/02_config/_boskos.yaml
+++ b/core-services/prow/02_config/_boskos.yaml
@@ -86,21 +86,6 @@ resources:
   - us-east-2--32
   - us-east-2--33
   - us-east-2--34
-  - us-east-2--35
-  - us-east-2--36
-  - us-east-2--37
-  - us-east-2--38
-  - us-east-2--39
-  - us-east-2--40
-  - us-east-2--41
-  - us-east-2--42
-  - us-east-2--43
-  - us-east-2--44
-  - us-east-2--45
-  - us-east-2--46
-  - us-east-2--47
-  - us-east-2--48
-  - us-east-2--49
   - us-west-1--00
   - us-west-1--01
   - us-west-1--02
@@ -136,21 +121,6 @@ resources:
   - us-west-1--32
   - us-west-1--33
   - us-west-1--34
-  - us-west-1--35
-  - us-west-1--36
-  - us-west-1--37
-  - us-west-1--38
-  - us-west-1--39
-  - us-west-1--40
-  - us-west-1--41
-  - us-west-1--42
-  - us-west-1--43
-  - us-west-1--44
-  - us-west-1--45
-  - us-west-1--46
-  - us-west-1--47
-  - us-west-1--48
-  - us-west-1--49
   - us-west-2--00
   - us-west-2--01
   - us-west-2--02
@@ -186,21 +156,6 @@ resources:
   - us-west-2--32
   - us-west-2--33
   - us-west-2--34
-  - us-west-2--35
-  - us-west-2--36
-  - us-west-2--37
-  - us-west-2--38
-  - us-west-2--39
-  - us-west-2--40
-  - us-west-2--41
-  - us-west-2--42
-  - us-west-2--43
-  - us-west-2--44
-  - us-west-2--45
-  - us-west-2--46
-  - us-west-2--47
-  - us-west-2--48
-  - us-west-2--49
   state: free
   type: aws-quota-slice
 - names:
diff --git a/core-services/prow/02_config/generate-boskos.py b/core-services/prow/02_config/generate-boskos.py
index 9567a088f9a95..a8f8c2a6ab2a1 100755
--- a/core-services/prow/02_config/generate-boskos.py
+++ b/core-services/prow/02_config/generate-boskos.py
@@ -7,9 +7,9 @@
     'aws-quota-slice': {
         # Wild guesses.  We'll see when we hit quota issues
         'us-east-1': 50,
-        'us-east-2': 50,
-        'us-west-1': 50,
-        'us-west-2': 50,
+        'us-east-2': 35,
+        'us-west-1': 35,
+        'us-west-2': 35,
     },
     'azure4-quota-slice': {
         'centralus': 33,