diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 221aad26b..ec2051081 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -18,7 +18,7 @@ services:
     networks:
       - sapl-net
   saplsolr:
-    image: solr:8.3
+    image: solr:8.9
     restart: always
     command: bin/solr start -c -f
     container_name: solr
diff --git a/requirements/requirements.txt b/requirements/requirements.txt
index 3b522725c..3feed756f 100644
--- a/requirements/requirements.txt
+++ b/requirements/requirements.txt
@@ -1,5 +1,5 @@
 django==2.2.24
-django-haystack==2.8.1
+django-haystack==3.1.1
 django-filter==2.4.0
 djangorestframework==3.12.4
 dj-database-url==0.5.0
diff --git a/sapl/base/search_indexes.py b/sapl/base/search_indexes.py
index 7e5df5737..e76f00168 100644
--- a/sapl/base/search_indexes.py
+++ b/sapl/base/search_indexes.py
@@ -38,9 +38,14 @@ class TextExtractField(CharField):
         try:
             with open(arquivo.path, 'rb') as f:
                 content = self.backend.extract_file_contents(f)
-                if not content or not content['contents']:
-                    return ''
-                data = content['contents']
+                data = ''
+                if content:
+                    # update from Solr 7.5 to 8.9
+                    if content['contents']:
+                        data += content['contents']
+                    if content['file']:
+                        data += content['file']
+                return data
         except Exception as e:
             print('erro processando arquivo: ' % arquivo.path)
             self.logger.error(arquivo.path)
diff --git a/solr/docs_stats.py b/solr/docs_stats.py
deleted file mode 100644
index 5343cfb15..000000000
--- a/solr/docs_stats.py
+++ /dev/null
@@ -1,37 +0,0 @@
-import requests
-
-"""
-    Imprime quantidade de colletions, qtd de documentos por collection e
-    total de documentos indexados.
-"""
-
-BASE_URL='http://localhost:8983/solr'
-
-
-if __name__=='__main__':
-
-    resp = requests.get(BASE_URL+'/admin/collections?action=LIST')
-
-    collections = sorted(resp.json()['collections'])
-
-    largest_col = (None,-1)
-    total_docs = 0
-    
-    print("Collection\t\t\tNumber of documents")
-    print("--------------------------------------------------")
-    
-    for c in collections:
-        r = requests.get(BASE_URL+'/{}/select?q=*:*&rows=0'.format(c))
-        num_docs = r.json()['response']['numFound']
-        total_docs += num_docs
-
-        if num_docs >= largest_col[1]:
-            largest_col = (c, num_docs)
-        
-        print("%30s\t%6s" % (c, num_docs))
-
-    print("------------------------------------------")
-    print("- Number of collections: %s\n" % len(collections))
-    print("- Largest collection: '%s' (%s docs)\n" % largest_col)
-    print("- Total documents accross all collections: %s\n" % total_docs)
-
diff --git a/solr/sapl_configset/conf/managed-schema b/solr/sapl_configset/conf/managed-schema
index b6ecffaaf..6b4ec2a35 100644
--- a/solr/sapl_configset/conf/managed-schema
+++ b/solr/sapl_configset/conf/managed-schema
@@ -120,7 +120,7 @@
     <field name="django_ct" type="string" indexed="true" stored="true" multiValued="false"/>
     <field name="django_id" type="string" indexed="true" stored="true" multiValued="false"/>
     <field name="text" type="text_pt" indexed="true" stored="true" multiValued="false" />
-    <field name="last_update" type="pdate" indexed="true" stored="true" default="NOW" />
+    <field name="last_update" type="pdate" indexed="true" stored="true" default="NOW" required="false" />
 
     <!-- This can be enabled, in case the client does not know what fields may be searched. It isn't enabled by default
          because it's very expensive to index everything twice. -->
@@ -552,7 +552,7 @@
         <charFilter class="solr.HTMLStripCharFilterFactory"/> 
         <tokenizer class="solr.StandardTokenizerFactory"/>
         <filter class="solr.LowerCaseFilterFactory"/>
-        <filter class="solr.StopFilterFactory" ignoreCase="true" words="lang/stopwords_pt.txt" format="snowball" />
+        <!-- <filter class="solr.StopFilterFactory" ignoreCase="true" words="lang/stopwords_pt.txt" format="snowball" /> -->
         <filter class="solr.PortugueseLightStemFilterFactory"/>
         <!-- less aggressive: <filter class="solr.PortugueseMinimalStemFilterFactory"/> -->
         <!-- more aggressive: <filter class="solr.SnowballPorterFilterFactory" language="Portuguese"/> -->
diff --git a/solr/sapl_configset/conf/solrconfig.xml b/solr/sapl_configset/conf/solrconfig.xml
index 8f5220a80..b79103f6d 100644
--- a/solr/sapl_configset/conf/solrconfig.xml
+++ b/solr/sapl_configset/conf/solrconfig.xml
@@ -310,7 +310,7 @@
          have some sort of hard autoCommit to limit the log size.
       -->
     <autoCommit>
-      <maxTime>180000</maxTime>
+      <maxTime>300000</maxTime>
       <openSearcher>false</openSearcher>
     </autoCommit>