diff --git a/.github/workflows/sif_database.yml b/.github/workflows/sif_database.yml
index 2879b61..c74bbcb 100644
--- a/.github/workflows/sif_database.yml
+++ b/.github/workflows/sif_database.yml
@@ -5,10 +5,12 @@ on:
       - master
   pull_request:
     types: [opened, synchronize, reopened]
+
 jobs:
   build:
     name: Verify SIF files and CLASSF.DB consistency
     runs-on: ubuntu-latest
+
     steps:
       - name: Checkout SIFDecode
         uses: actions/checkout@v4
@@ -17,12 +19,12 @@ jobs:
         shell: bash
         run: |
           cd $GITHUB_WORKSPACE/../
-          git clone https://bitbucket.org/optrove/sif
+          git clone https://github.com/ralna/SIF.git
 
       - name: Check entries in CLASSF.DB and SIF files
         shell: bash
         run: |
-          cd $GITHUB_WORKSPACE/../sif
+          cd $GITHUB_WORKSPACE/../SIF
 
           # Read the CLASSF.DB file and store the problem names in an array
           mapfile -t db_problems < <(awk '{print $1}' CLASSF.DB)
@@ -31,18 +33,34 @@ jobs:
           missing_sif_count=0
           missing_db_count=0
 
-          # Check if each SIF file has an entry in CLASSF.DB
+          # Collect all available problems from:
+          #   *.SIF
+          #   *.SIF.bz2
+          declare -A sif_problems
+
+          shopt -s nullglob
+
           for file in *.SIF; do
-            problem_name="${file%.SIF}"
+            sif_problems["${file%.SIF}"]=1
+          done
+
+          for file in *.SIF.bz2; do
+            sif_problems["${file%.SIF.bz2}"]=1
+          done
+
+          # Check that every SIF/SIF.bz2 file is listed in CLASSF.DB
+          for problem_name in "${!sif_problems[@]}"; do
             if [[ " ${db_problems[*]} " != *" ${problem_name} "* ]]; then
               echo "${problem_name} is ABSENT from CLASSF.DB"
               missing_db_count=$((missing_db_count + 1))
             fi
           done
 
-          # Check if each entry in CLASSF.DB has a corresponding SIF file
+          # Check that every CLASSF.DB entry has either:
+          #   problem.SIF
+          #   problem.SIF.bz2
           for problem in "${db_problems[@]}"; do
-            if [[ ! -f "${problem}.SIF" ]]; then
+            if [[ ! -f "${problem}.SIF" && ! -f "${problem}.SIF.bz2" ]]; then
               echo "SIF file for ${problem} is MISSING"
               missing_sif_count=$((missing_sif_count + 1))
             fi
@@ -51,7 +69,6 @@ jobs:
           echo "Total number of SIF files without DB entries: ${missing_db_count}"
           echo "Total number of DB entries without SIF files: ${missing_sif_count}"
 
-          # Exit with error if any issues were found
           if [ "${missing_db_count}" -ne 0 ] || [ "${missing_sif_count}" -ne 0 ]; then
             echo "Error: Mismatch between CLASSF.DB entries and SIF files"
             exit 1
diff --git a/.github/workflows/sifdecoder.yml b/.github/workflows/sifdecoder.yml
index 93532b7..64249a4 100644
--- a/.github/workflows/sifdecoder.yml
+++ b/.github/workflows/sifdecoder.yml
@@ -13,7 +13,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest]
         version: ['12']
-        problems: ['sifcollection', 'maros-meszaros', 'netlib-lp']
+        problems: ['sif', 'maros-meszaros', 'netlib-lp']
         precision: ['single', 'double', 'quadruple']
     runs-on: ${{ matrix.os }}
     steps:
@@ -43,16 +43,16 @@ jobs:
         shell: bash
         run: |
           cd $GITHUB_WORKSPACE/../
-          if [[ "${{ matrix.problems }}" == "sifcollection" ]]; then
-            git clone https://bitbucket.org/optrove/sif
+          if [[ "${{ matrix.problems }}" == "sif" ]]; then
+            git clone https://github.com/ralna/SIF.git
           fi
           if [[ "${{ matrix.problems }}" == "maros-meszaros" ]]; then
-            git clone https://bitbucket.org/optrove/maros-meszaros
-            mv maros-meszaros sif
+            git clone https://github.com/ralna/maros-meszaros
+            mv maros-meszaros SIF
           fi
           if [[ "${{ matrix.problems }}" == "netlib-lp" ]]; then
-            git clone https://bitbucket.org/optrove/netlib-lp
-            mv netlib-lp sif
+            git clone https://github.com/ralna/netlib-lp
+            mv netlib-lp SIF
           fi
 
       - name: SIFDecode
@@ -60,12 +60,17 @@ jobs:
         run: |
           meson setup builddir --buildtype=debug -Ddefault_library=static
           meson compile -C builddir
-          cp builddir/sifdecoder $GITHUB_WORKSPACE/../sif
+          cp builddir/sifdecoder $GITHUB_WORKSPACE/../SIF
 
       - name: Decode the SIF files
         shell: bash
         run: |
-          cd $GITHUB_WORKSPACE/../sif
+          cd $GITHUB_WORKSPACE/../SIF
+          for file in *.SIF.bz2; do
+            if [ -f "$file" ]; then
+              bunzip2 -k "$file"
+            fi
+          done
           for file in *.SIF; do
             if [ -f "$file" ]; then
               echo "Processing $file"